Merge branch 'factory' into sle-15-sp4

CVE-2025-11468: preserving parens when folding comments in
  email headers (bsc#1257029, gh#python/cpython#143935).
  CVE-2025-11468-email-hdr-fold-comment.patch
CVE-2026-0672: rejects control characters in http cookies.
  (bsc#1257031, gh#python/cpython#143919)
  CVE-2026-0672-http-hdr-inject-cookie-Morsel.patch
CVE-2026-0865: rejecting control characters in
  wsgiref.headers.Headers, which could be abused for injecting
  false HTTP headers. (bsc#1257042, gh#python/cpython#143916)
  CVE-2026-0865-wsgiref-ctrl-chars.patch
CVE-2025-15366: basically the same as the previous patch for
  IMAP protocol. (bsc#1257044, gh#python/cpython#143921)
  CVE-2025-15366-imap-ctrl-chars.patch
CVE-2025-15282: basically the same as the previous patch for
  urllib library. (bsc#1257046, gh#python/cpython#143925)
  CVE-2025-15282-urllib-ctrl-chars.patch
CVE-2025-15367: basically the same as the previous patch for
  poplib library. (bsc#1257041, gh#python/cpython#143923)
  CVE-2025-15367-poplib-ctrl-chars.patch
CVE-2025-12781: fix decoding with non-standard Base64 alphabet
  (bsc#1257108, gh#python/cpython#125346)
  CVE-2025-12781-b64decode-alt-chars.patch

CVE-2023-52425-libexpat-2.6.0-backport.patch

@@ -6,10 +6,10 @@
  Lib/test/test_xml_etree.py   |   12 ------------
  5 files changed, 37 insertions(+), 44 deletions(-)
 
-Index: Python-3.11.12/Lib/test/support/__init__.py
+Index: Python-3.11.14/Lib/test/support/__init__.py
 ===================================================================
---- Python-3.11.12.orig/Lib/test/support/__init__.py	2025-04-11 10:52:43.191010503 +0200
+--- Python-3.11.14.orig/Lib/test/support/__init__.py	2025-11-15 19:15:08.449938538 +0100
-+++ Python-3.11.12/Lib/test/support/__init__.py	2025-04-11 10:52:44.802161741 +0200
++++ Python-3.11.14/Lib/test/support/__init__.py	2025-11-15 19:15:12.859120260 +0100
 @@ -8,6 +8,7 @@
  import functools
  import os
@@ -27,7 +27,7 @@ Index: Python-3.11.12/Lib/test/support/__init__.py
      ]
  
  
-@@ -2244,6 +2245,17 @@
+@@ -2279,6 +2280,17 @@
          }
      return ignored
  
@@ -46,10 +46,10 @@ Index: Python-3.11.12/Lib/test/support/__init__.py
 +fails_with_expat_2_6_0 = (unittest.expectedFailure
 +                          if is_expat_2_6_0
 +                          else lambda test: test)
-Index: Python-3.11.12/Lib/test/test_minidom.py
+Index: Python-3.11.14/Lib/test/test_minidom.py
 ===================================================================
---- Python-3.11.12.orig/Lib/test/test_minidom.py	2025-04-11 10:52:21.907086938 +0200
+--- Python-3.11.14.orig/Lib/test/test_minidom.py	2025-11-15 19:14:53.915952608 +0100
-+++ Python-3.11.12/Lib/test/test_minidom.py	2025-04-11 10:52:44.802522893 +0200
++++ Python-3.11.14/Lib/test/test_minidom.py	2025-11-15 19:15:12.859877278 +0100
 @@ -6,7 +6,6 @@
  from test import support
  import unittest
@@ -94,10 +94,10 @@ Index: Python-3.11.12/Lib/test/test_minidom.py
              parseString('<element xmlns:abc="http:abc.com/de f g/hi/j k"><abc:foo /></element>')
  
      def testDocRemoveChild(self):
-Index: Python-3.11.12/Lib/test/test_pyexpat.py
+Index: Python-3.11.14/Lib/test/test_pyexpat.py
 ===================================================================
---- Python-3.11.12.orig/Lib/test/test_pyexpat.py	2025-04-11 10:52:22.076696906 +0200
+--- Python-3.11.14.orig/Lib/test/test_pyexpat.py	2025-11-15 19:14:53.915952608 +0100
-+++ Python-3.11.12/Lib/test/test_pyexpat.py	2025-04-11 10:52:44.803228085 +0200
++++ Python-3.11.14/Lib/test/test_pyexpat.py	2025-11-15 19:15:12.860334045 +0100
 @@ -14,8 +14,7 @@
  from xml.parsers import expat
  from xml.parsers.expat import errors
@@ -108,7 +108,7 @@ Index: Python-3.11.12/Lib/test/test_pyexpat.py
  
  class SetAttributeTest(unittest.TestCase):
      def setUp(self):
-@@ -770,9 +769,8 @@
+@@ -806,9 +805,8 @@
          self.assertIs(parser.GetReparseDeferralEnabled(), enabled)
  
      def test_reparse_deferral_enabled(self):
@@ -120,7 +120,7 @@ Index: Python-3.11.12/Lib/test/test_pyexpat.py
  
          started = []
  
-@@ -801,9 +799,9 @@
+@@ -837,9 +835,9 @@
  
          parser = expat.ParserCreate()
          parser.StartElementHandler = start_element
@@ -132,10 +132,10 @@ Index: Python-3.11.12/Lib/test/test_pyexpat.py
  
          for chunk in (b'<doc', b'/>'):
              parser.Parse(chunk, False)
-Index: Python-3.11.12/Lib/test/test_sax.py
+Index: Python-3.11.14/Lib/test/test_sax.py
 ===================================================================
---- Python-3.11.12.orig/Lib/test/test_sax.py	2025-04-11 10:52:22.111440337 +0200
+--- Python-3.11.14.orig/Lib/test/test_sax.py	2025-11-15 19:14:53.915952608 +0100
-+++ Python-3.11.12/Lib/test/test_sax.py	2025-04-11 10:52:44.803567098 +0200
++++ Python-3.11.14/Lib/test/test_sax.py	2025-11-15 19:15:12.860746114 +0100
 @@ -19,13 +19,11 @@
  from io import BytesIO, StringIO
  import codecs
@@ -187,10 +187,10 @@ Index: Python-3.11.12/Lib/test/test_sax.py
  
          self.assertFalse(parser._parser.GetReparseDeferralEnabled())
  
-Index: Python-3.11.12/Lib/test/test_xml_etree.py
+Index: Python-3.11.14/Lib/test/test_xml_etree.py
 ===================================================================
---- Python-3.11.12.orig/Lib/test/test_xml_etree.py	2025-04-11 10:52:22.425637912 +0200
+--- Python-3.11.14.orig/Lib/test/test_xml_etree.py	2025-11-15 19:14:53.915952608 +0100
-+++ Python-3.11.12/Lib/test/test_xml_etree.py	2025-04-11 10:52:44.804234785 +0200
++++ Python-3.11.14/Lib/test/test_xml_etree.py	2025-11-15 19:15:12.861491049 +0100
 @@ -13,7 +13,6 @@
  import operator
  import os

CVE-2023-52425-remove-reparse_deferral-tests.patch

@@ -4,9 +4,11 @@
  Lib/test/test_xml_etree.py |    2 ++
  3 files changed, 6 insertions(+)
 
---- a/Lib/test/test_pyexpat.py
+Index: Python-3.11.14/Lib/test/test_pyexpat.py
-+++ b/Lib/test/test_pyexpat.py
+===================================================================
-@@ -768,6 +768,7 @@ class ReparseDeferralTest(unittest.TestC
+--- Python-3.11.14.orig/Lib/test/test_pyexpat.py	2025-11-15 19:15:12.860334045 +0100
++++ Python-3.11.14/Lib/test/test_pyexpat.py	2025-11-15 19:15:15.541090355 +0100
+@@ -804,6 +804,7 @@
          parser.SetReparseDeferralEnabled(True)
          self.assertIs(parser.GetReparseDeferralEnabled(), enabled)
  
@@ -14,7 +16,7 @@
      def test_reparse_deferral_enabled(self):
          if not is_expat_2_6_0:
              self.skipTest("Linked libexpat doesn't support reparse deferral")
-@@ -791,6 +792,7 @@ class ReparseDeferralTest(unittest.TestC
+@@ -827,6 +828,7 @@
  
          self.assertEqual(started, ['doc'])
  
@@ -22,9 +24,11 @@
      def test_reparse_deferral_disabled(self):
          started = []
  
---- a/Lib/test/test_sax.py
+Index: Python-3.11.14/Lib/test/test_sax.py
-+++ b/Lib/test/test_sax.py
+===================================================================
-@@ -1213,6 +1213,7 @@ class ExpatReaderTest(XmlTestBase):
+--- Python-3.11.14.orig/Lib/test/test_sax.py	2025-11-15 19:15:12.860746114 +0100
++++ Python-3.11.14/Lib/test/test_sax.py	2025-11-15 19:15:15.541608234 +0100
+@@ -1213,6 +1213,7 @@
  
          self.assertEqual(result.getvalue(), start + b"<doc>text</doc>")
  
@@ -32,7 +36,7 @@
      def test_flush_reparse_deferral_enabled(self):
          if not is_expat_2_6_0:
              self.skipTest("Linked libexpat doesn't support reparse deferral")
-@@ -1238,6 +1239,7 @@ class ExpatReaderTest(XmlTestBase):
+@@ -1238,6 +1239,7 @@
  
          self.assertEqual(result.getvalue(), start + b"<doc></doc>")
  
@@ -40,9 +44,11 @@
      def test_flush_reparse_deferral_disabled(self):
          if not is_expat_2_6_0:
              self.skipTest("Linked libexpat doesn't support reparse deferral")
---- a/Lib/test/test_xml_etree.py
+Index: Python-3.11.14/Lib/test/test_xml_etree.py
-+++ b/Lib/test/test_xml_etree.py
+===================================================================
-@@ -1620,6 +1620,7 @@ class XMLPullParserTest(unittest.TestCas
+--- Python-3.11.14.orig/Lib/test/test_xml_etree.py	2025-11-15 19:15:12.861491049 +0100
++++ Python-3.11.14/Lib/test/test_xml_etree.py	2025-11-15 19:15:15.542327817 +0100
+@@ -1620,6 +1620,7 @@
          with self.assertRaises(ValueError):
              ET.XMLPullParser(events=('start', 'end', 'bogus'))
  
@@ -50,7 +56,7 @@
      def test_flush_reparse_deferral_enabled(self):
          parser = ET.XMLPullParser(events=('start', 'end'))
  
-@@ -1641,6 +1642,7 @@ class XMLPullParserTest(unittest.TestCas
+@@ -1641,6 +1642,7 @@
  
          self.assert_event_tags(parser, [('end', 'doc')])
  

CVE-2025-11468-email-hdr-fold-comment.patch

@@ -0,0 +1,109 @@
+From dfaeb01d7859417f4e4aab8c3e6c88028c878056 Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Mon, 19 Jan 2026 06:38:22 -0600
+Subject: [PATCH] gh-143935: Email preserve parens when folding comments
+ (GH-143936)
+
+Fix a bug in the folding of comments when flattening an email message
+using a modern email policy. Comments consisting of a very long sequence of
+non-foldable characters could trigger a forced line wrap that omitted the
+required leading space on the continuation line, causing the remainder of
+the comment to be interpreted as a new header field. This enabled header
+injection with carefully crafted inputs.
+(cherry picked from commit 17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2)
+
+Co-authored-by: Seth Michael Larson <seth@python.org>
+Co-authored-by: Denis Ledoux <dle@odoo.com>
+---
+ Lib/email/_header_value_parser.py             | 15 +++++++++++-
+ .../test_email/test__header_value_parser.py   | 23 +++++++++++++++++++
+ ...-01-16-14-40-31.gh-issue-143935.U2YtKl.rst |  6 +++++
+ 3 files changed, 43 insertions(+), 1 deletion(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-14-40-31.gh-issue-143935.U2YtKl.rst
+
+diff --git a/Lib/email/_header_value_parser.py b/Lib/email/_header_value_parser.py
+index 0183a1508b1219..89950c825b6fff 100644
+--- a/Lib/email/_header_value_parser.py
++++ b/Lib/email/_header_value_parser.py
+@@ -101,6 +101,12 @@ def make_quoted_pairs(value):
+     return str(value).replace('\\', '\\\\').replace('"', '\\"')
+ 
+ 
++def make_parenthesis_pairs(value):
++    """Escape parenthesis and backslash for use within a comment."""
++    return str(value).replace('\\', '\\\\') \
++        .replace('(', '\\(').replace(')', '\\)')
++
++
+ def quote_string(value):
+     escaped = make_quoted_pairs(value)
+     return f'"{escaped}"'
+@@ -927,7 +933,7 @@ def value(self):
+         return ' '
+ 
+     def startswith_fws(self):
+-        return True
++        return self and self[0] in WSP
+ 
+ 
+ class ValueTerminal(Terminal):
+@@ -2883,6 +2889,13 @@ def _refold_parse_tree(parse_tree, *, policy):
+                     [ValueTerminal(make_quoted_pairs(p), 'ptext')
+                      for p in newparts] +
+                     [ValueTerminal('"', 'ptext')])
++            if part.token_type == 'comment':
++                newparts = (
++                    [ValueTerminal('(', 'ptext')] +
++                    [ValueTerminal(make_parenthesis_pairs(p), 'ptext')
++                     if p.token_type == 'ptext' else p
++                     for p in newparts] +
++                    [ValueTerminal(')', 'ptext')])
+             if not part.as_ew_allowed:
+                 wrap_as_ew_blocked += 1
+                 newparts.append(end_ew_not_allowed)
+diff --git a/Lib/test/test_email/test__header_value_parser.py b/Lib/test/test_email/test__header_value_parser.py
+index 6025b34ac4a0f8..45ff73b5905fde 100644
+--- a/Lib/test/test_email/test__header_value_parser.py
++++ b/Lib/test/test_email/test__header_value_parser.py
+@@ -3050,6 +3050,29 @@ def test_address_list_with_specials_in_long_quoted_string(self):
+             with self.subTest(to=to):
+                 self._test(parser.get_address_list(to)[0], folded, policy=policy)
+ 
++    def test_address_list_with_long_unwrapable_comment(self):
++        policy = self.policy.clone(max_line_length=40)
++        cases = [
++            # (to, folded)
++            ('(loremipsumdolorsitametconsecteturadipi)<spy@example.org>',
++             '(loremipsumdolorsitametconsecteturadipi)<spy@example.org>\n'),
++            ('<spy@example.org>(loremipsumdolorsitametconsecteturadipi)',
++             '<spy@example.org>(loremipsumdolorsitametconsecteturadipi)\n'),
++            ('(loremipsum dolorsitametconsecteturadipi)<spy@example.org>',
++             '(loremipsum dolorsitametconsecteturadipi)<spy@example.org>\n'),
++             ('<spy@example.org>(loremipsum dolorsitametconsecteturadipi)',
++             '<spy@example.org>(loremipsum\n dolorsitametconsecteturadipi)\n'),
++            ('(Escaped \\( \\) chars \\\\ in comments stay escaped)<spy@example.org>',
++             '(Escaped \\( \\) chars \\\\ in comments stay\n escaped)<spy@example.org>\n'),
++            ('((loremipsum)(loremipsum)(loremipsum)(loremipsum))<spy@example.org>',
++             '((loremipsum)(loremipsum)(loremipsum)(loremipsum))<spy@example.org>\n'),
++            ('((loremipsum)(loremipsum)(loremipsum) (loremipsum))<spy@example.org>',
++             '((loremipsum)(loremipsum)(loremipsum)\n (loremipsum))<spy@example.org>\n'),
++        ]
++        for (to, folded) in cases:
++            with self.subTest(to=to):
++                self._test(parser.get_address_list(to)[0], folded, policy=policy)
++
+     # XXX Need tests with comments on various sides of a unicode token,
+     # and with unicode tokens in the comments.  Spaces inside the quotes
+     # currently don't do the right thing.
+diff --git a/Misc/NEWS.d/next/Security/2026-01-16-14-40-31.gh-issue-143935.U2YtKl.rst b/Misc/NEWS.d/next/Security/2026-01-16-14-40-31.gh-issue-143935.U2YtKl.rst
+new file mode 100644
+index 00000000000000..c3d864936884ac
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2026-01-16-14-40-31.gh-issue-143935.U2YtKl.rst
+@@ -0,0 +1,6 @@
++Fixed a bug in the folding of comments when flattening an email message
++using a modern email policy. Comments consisting of a very long sequence of
++non-foldable characters could trigger a forced line wrap that omitted the
++required leading space on the continuation line, causing the remainder of
++the comment to be interpreted as a new header field. This enabled header
++injection with carefully crafted inputs.

CVE-2025-12084-minidom-quad-search.patch

@@ -0,0 +1,93 @@
+From b95c10349956d95e258553def0fcc52ea3ef8f82 Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Wed, 3 Dec 2025 01:16:37 -0600
+Subject: [PATCH] gh-142145: Remove quadratic behavior in node ID cache
+ clearing (GH-142146)
+
+* Remove quadratic behavior in node ID cache clearing
+
+Co-authored-by: Jacob Walls <38668450+jacobtylerwalls@users.noreply.github.com>
+
+* Add news fragment
+
+---------
+(cherry picked from commit 08d8e18ad81cd45bc4a27d6da478b51ea49486e4)
+
+Co-authored-by: Seth Michael Larson <seth@python.org>
+Co-authored-by: Jacob Walls <38668450+jacobtylerwalls@users.noreply.github.com>
+---
+ Lib/test/test_minidom.py                                                 |   18 ++++++++++
+ Lib/xml/dom/minidom.py                                                   |    9 -----
+ Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst |    1 
+ 3 files changed, 20 insertions(+), 8 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst
+
+Index: Python-3.11.14/Lib/test/test_minidom.py
+===================================================================
+--- Python-3.11.14.orig/Lib/test/test_minidom.py	2025-12-19 22:55:59.547417036 +0100
++++ Python-3.11.14/Lib/test/test_minidom.py	2025-12-19 22:56:07.607956864 +0100
+@@ -2,6 +2,7 @@
+ 
+ import copy
+ import pickle
++import time
+ import io
+ from test import support
+ import unittest
+@@ -176,6 +177,23 @@
+         self.confirm(dom.documentElement.childNodes[-1].data == "Hello")
+         dom.unlink()
+ 
++    def testAppendChildNoQuadraticComplexity(self):
++        impl = getDOMImplementation()
++
++        newdoc = impl.createDocument(None, "some_tag", None)
++        top_element = newdoc.documentElement
++        children = [newdoc.createElement(f"child-{i}") for i in range(1, 2 ** 15 + 1)]
++        element = top_element
++
++        start = time.time()
++        for child in children:
++            element.appendChild(child)
++            element = child
++        end = time.time()
++
++        # This example used to take at least 30 seconds.
++        self.assertLess(end - start, 1)
++
+     def testAppendChildFragment(self):
+         dom, orig, c1, c2, c3, frag = self._create_fragment_test_nodes()
+         dom.documentElement.appendChild(frag)
+Index: Python-3.11.14/Lib/xml/dom/minidom.py
+===================================================================
+--- Python-3.11.14.orig/Lib/xml/dom/minidom.py	2025-10-09 18:16:55.000000000 +0200
++++ Python-3.11.14/Lib/xml/dom/minidom.py	2025-12-19 22:56:07.608359083 +0100
+@@ -292,13 +292,6 @@
+     childNodes.append(node)
+     node.parentNode = self
+ 
+-def _in_document(node):
+-    # return True iff node is part of a document tree
+-    while node is not None:
+-        if node.nodeType == Node.DOCUMENT_NODE:
+-            return True
+-        node = node.parentNode
+-    return False
+ 
+ def _write_data(writer, data):
+     "Writes datachars to writer."
+@@ -1539,7 +1532,7 @@
+     if node.nodeType == Node.DOCUMENT_NODE:
+         node._id_cache.clear()
+         node._id_search_stack = None
+-    elif _in_document(node):
++    elif node.ownerDocument:
+         node.ownerDocument._id_cache.clear()
+         node.ownerDocument._id_search_stack= None
+ 
+Index: Python-3.11.14/Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.11.14/Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst	2025-12-19 22:56:07.608664851 +0100
+@@ -0,0 +1 @@
++Remove quadratic behavior in ``xml.minidom`` node ID cache clearing.

CVE-2025-12781-b64decode-alt-chars.patch

@@ -0,0 +1,193 @@
+From f922c02c529d25d61aa9c28a8192639c1fce8d4d Mon Sep 17 00:00:00 2001
+From: Serhiy Storchaka <storchaka@gmail.com>
+Date: Wed, 5 Nov 2025 20:12:31 +0200
+Subject: [PATCH] gh-125346: Add more base64 tests
+
+Add more tests for the altchars argument of b64decode() and for the map01
+argument of b32decode().
+---
+ Doc/library/base64.rst                                                  |   18 +++-
+ Lib/base64.py                                                           |   40 ++++++++-
+ Lib/test/test_base64.py                                                 |   42 +++++++++-
+ Misc/NEWS.d/next/Library/2025-11-06-12-03-29.gh-issue-125346.7Gfpgw.rst |    5 +
+ 4 files changed, 91 insertions(+), 14 deletions(-)
+
+Index: Python-3.11.14/Doc/library/base64.rst
+===================================================================
+--- Python-3.11.14.orig/Doc/library/base64.rst	2025-10-09 18:16:55.000000000 +0200
++++ Python-3.11.14/Doc/library/base64.rst	2026-02-11 23:44:54.612595397 +0100
+@@ -74,15 +74,20 @@
+    A :exc:`binascii.Error` exception is raised
+    if *s* is incorrectly padded.
+ 
+-   If *validate* is ``False`` (the default), characters that are neither
++   If *validate* is false (the default), characters that are neither
+    in the normal base-64 alphabet nor the alternative alphabet are
+-   discarded prior to the padding check.  If *validate* is ``True``,
+-   these non-alphabet characters in the input result in a
+-   :exc:`binascii.Error`.
++   discarded prior to the padding check, but the ``+`` and ``/`` characters
++   keep their meaning if they are not in *altchars* (they will be discarded
++   in future Python versions).
++   If *validate* is true, these non-alphabet characters in the input
++   result in a :exc:`binascii.Error`.
+ 
+    For more information about the strict base64 check, see :func:`binascii.a2b_base64`
+ 
+-   May assert or raise a :exc:`ValueError` if the length of *altchars* is not 2.
++   .. deprecated:: next
++      Accepting the ``+`` and ``/`` characters with an alternative alphabet
++      is now deprecated.
++
+ 
+ .. function:: standard_b64encode(s)
+ 
+@@ -113,6 +118,9 @@
+    ``/`` in the standard Base64 alphabet, and return the decoded
+    :class:`bytes`.
+ 
++   .. deprecated:: next
++      Accepting the ``+`` and ``/`` characters is now deprecated.
++
+ 
+ .. function:: b32encode(s)
+ 
+Index: Python-3.11.14/Lib/base64.py
+===================================================================
+--- Python-3.11.14.orig/Lib/base64.py	2026-02-11 23:44:42.099270109 +0100
++++ Python-3.11.14/Lib/base64.py	2026-02-11 23:44:54.613055284 +0100
+@@ -71,20 +71,39 @@
+     The result is returned as a bytes object.  A binascii.Error is raised if
+     s is incorrectly padded.
+ 
+-    If validate is False (the default), characters that are neither in the
++    If validate is false (the default), characters that are neither in the
+     normal base-64 alphabet nor the alternative alphabet are discarded prior
+-    to the padding check.  If validate is True, these non-alphabet characters
++    to the padding check.  If validate is true, these non-alphabet characters
+     in the input result in a binascii.Error.
+     For more information about the strict base64 check, see:
+ 
+     https://docs.python.org/3.11/library/binascii.html#binascii.a2b_base64
+     """
+     s = _bytes_from_decode_data(s)
++    badchar = None
+     if altchars is not None:
+         altchars = _bytes_from_decode_data(altchars)
+-        assert len(altchars) == 2, repr(altchars)
++        if len(altchars) != 2:
++            raise ValueError(f'invalid altchars: {altchars!r}')
++        for b in b'+/':
++            if b not in altchars and b in s:
++                badchar = b
++                break
+         s = s.translate(bytes.maketrans(altchars, b'+/'))
+-    return binascii.a2b_base64(s, strict_mode=validate)
++    result = binascii.a2b_base64(s, strict_mode=validate)
++    if badchar is not None:
++        import warnings
++        if validate:
++            warnings.warn(f'invalid character {chr(badchar)!a} in Base64 data '
++                          f'with altchars={altchars!r} and validate=True '
++                          f'will be an error in future Python versions',
++                          DeprecationWarning, stacklevel=2)
++        else:
++            warnings.warn(f'invalid character {chr(badchar)!a} in Base64 data '
++                          f'with altchars={altchars!r} and validate=False '
++                          f'will be discarded in future Python versions',
++                          FutureWarning, stacklevel=2)
++    return result
+ 
+ 
+ def standard_b64encode(s):
+@@ -129,8 +148,19 @@
+     The alphabet uses '-' instead of '+' and '_' instead of '/'.
+     """
+     s = _bytes_from_decode_data(s)
++    badchar = None
++    for b in b'+/':
++        if b in s:
++            badchar = b
++            break
+     s = s.translate(_urlsafe_decode_translation)
+-    return b64decode(s)
++    result = binascii.a2b_base64(s, strict_mode=False)
++    if badchar is not None:
++        import warnings
++        warnings.warn(f'invalid character {chr(badchar)!a} in URL-safe Base64 data '
++                      f'will be discarded in future Python versions',
++                      FutureWarning, stacklevel=2)
++    return result
+ 
+ 
+ 
+Index: Python-3.11.14/Lib/test/test_base64.py
+===================================================================
+--- Python-3.11.14.orig/Lib/test/test_base64.py	2026-02-11 23:44:44.270637438 +0100
++++ Python-3.11.14/Lib/test/test_base64.py	2026-02-11 23:44:54.613405604 +0100
+@@ -228,6 +228,25 @@
+                                b'\xd3V\xbeo\xf7\x1d')
+         self.check_decode_type_errors(base64.urlsafe_b64decode)
+ 
++    def test_b64decode_altchars(self):
++        # Test with arbitrary alternative characters
++        eq = self.assertEqual
++        res = b'\xd3V\xbeo\xf7\x1d'
++        for altchars in b'*$', b'+/', b'/+', b'+_', b'-+', b'-/', b'/_':
++            data = b'01a%cb%ccd' % tuple(altchars)
++            data_str = data.decode('ascii')
++            altchars_str = altchars.decode('ascii')
++
++            eq(base64.b64decode(data, altchars=altchars), res)
++            eq(base64.b64decode(data_str, altchars=altchars), res)
++            eq(base64.b64decode(data, altchars=altchars_str), res)
++            eq(base64.b64decode(data_str, altchars=altchars_str), res)
++
++        self.assertRaises(ValueError, base64.b64decode, b'', altchars=b'+')
++        self.assertRaises(ValueError, base64.b64decode, b'', altchars=b'+/-')
++        self.assertRaises(ValueError, base64.b64decode, '', altchars='+')
++        self.assertRaises(ValueError, base64.b64decode, '', altchars='+/-')
++
+     def test_b64decode_padding_error(self):
+         self.assertRaises(binascii.Error, base64.b64decode, b'abc')
+         self.assertRaises(binascii.Error, base64.b64decode, 'abc')
+@@ -259,10 +278,25 @@
+             with self.assertRaises(binascii.Error):
+                 base64.b64decode(bstr.decode('ascii'), validate=True)
+ 
+-        # Normal alphabet characters not discarded when alternative given
+-        res = b'\xFB\xEF\xBE\xFF\xFF\xFF'
+-        self.assertEqual(base64.b64decode(b'++[[//]]', b'[]'), res)
+-        self.assertEqual(base64.urlsafe_b64decode(b'++--//__'), res)
++        # Normal alphabet characters will be discarded when alternative given
++        with self.assertWarns(FutureWarning):
++            self.assertEqual(base64.b64decode(b'++++', altchars=b'-_'),
++                             b'\xfb\xef\xbe')
++        with self.assertWarns(FutureWarning):
++            self.assertEqual(base64.b64decode(b'////', altchars=b'-_'),
++                             b'\xff\xff\xff')
++        with self.assertWarns(DeprecationWarning):
++            self.assertEqual(base64.b64decode(b'++++', altchars=b'-_', validate=True),
++                             b'\xfb\xef\xbe')
++        with self.assertWarns(DeprecationWarning):
++            self.assertEqual(base64.b64decode(b'////', altchars=b'-_', validate=True),
++                             b'\xff\xff\xff')
++        with self.assertWarns(FutureWarning):
++            self.assertEqual(base64.urlsafe_b64decode(b'++++'), b'\xfb\xef\xbe')
++        with self.assertWarns(FutureWarning):
++            self.assertEqual(base64.urlsafe_b64decode(b'////'), b'\xff\xff\xff')
++        with self.assertRaises(binascii.Error):
++            base64.b64decode(b'+/!', altchars=b'-_')
+ 
+     def test_b32encode(self):
+         eq = self.assertEqual
+Index: Python-3.11.14/Misc/NEWS.d/next/Library/2025-11-06-12-03-29.gh-issue-125346.7Gfpgw.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.11.14/Misc/NEWS.d/next/Library/2025-11-06-12-03-29.gh-issue-125346.7Gfpgw.rst	2026-02-11 23:44:54.613764682 +0100
+@@ -0,0 +1,5 @@
++Accepting ``+`` and ``/`` characters with an alternative alphabet in
++:func:`base64.b64decode` and :func:`base64.urlsafe_b64decode` is now
++deprecated.
++In future Python versions they will be errors in the strict mode and
++discarded in the non-strict mode.

CVE-2025-13836-http-resp-cont-len.patch

@@ -0,0 +1,155 @@
+From 4f2bc24b750a82d3b439f174e7717fc09820bfeb Mon Sep 17 00:00:00 2001
+From: Serhiy Storchaka <storchaka@gmail.com>
+Date: Mon, 1 Dec 2025 17:26:07 +0200
+Subject: [PATCH] gh-119451: Fix a potential denial of service in http.client
+ (GH-119454)
+
+Reading the whole body of the HTTP response could cause OOM if
+the Content-Length value is too large even if the server does not send
+a large amount of data. Now the HTTP client reads large data by chunks,
+therefore the amount of consumed memory is proportional to the amount
+of sent data.
+(cherry picked from commit 5a4c4a033a4a54481be6870aa1896fad732555b5)
+
+Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
+---
+ Lib/http/client.py                            | 28 ++++++--
+ Lib/test/test_httplib.py                      | 66 +++++++++++++++++++
+ ...-05-23-11-47-48.gh-issue-119451.qkJe9-.rst |  5 ++
+ 3 files changed, 95 insertions(+), 4 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst
+
+diff --git a/Lib/http/client.py b/Lib/http/client.py
+index 91ee1b470cfd47..c977612732afbc 100644
+--- a/Lib/http/client.py
++++ b/Lib/http/client.py
+@@ -111,6 +111,11 @@
+ _MAXLINE = 65536
+ _MAXHEADERS = 100
+ 
++# Data larger than this will be read in chunks, to prevent extreme
++# overallocation.
++_MIN_READ_BUF_SIZE = 1 << 20
++
++
+ # Header name/value ABNF (http://tools.ietf.org/html/rfc7230#section-3.2)
+ #
+ # VCHAR          = %x21-7E
+@@ -635,10 +640,25 @@ def _safe_read(self, amt):
+         reading. If the bytes are truly not available (due to EOF), then the
+         IncompleteRead exception can be used to detect the problem.
+         """
+-        data = self.fp.read(amt)
+-        if len(data) < amt:
+-            raise IncompleteRead(data, amt-len(data))
+-        return data
++        cursize = min(amt, _MIN_READ_BUF_SIZE)
++        data = self.fp.read(cursize)
++        if len(data) >= amt:
++            return data
++        if len(data) < cursize:
++            raise IncompleteRead(data, amt - len(data))
++
++        data = io.BytesIO(data)
++        data.seek(0, 2)
++        while True:
++            # This is a geometric increase in read size (never more than
++            # doubling out the current length of data per loop iteration).
++            delta = min(cursize, amt - cursize)
++            data.write(self.fp.read(delta))
++            if data.tell() >= amt:
++                return data.getvalue()
++            cursize += delta
++            if data.tell() < cursize:
++                raise IncompleteRead(data.getvalue(), amt - data.tell())
+ 
+     def _safe_readinto(self, b):
+         """Same as _safe_read, but for reading into a buffer."""
+diff --git a/Lib/test/test_httplib.py b/Lib/test/test_httplib.py
+index 8b9d49ec094813..55363413b3b140 100644
+--- a/Lib/test/test_httplib.py
++++ b/Lib/test/test_httplib.py
+@@ -1390,6 +1390,72 @@ def run_server():
+         thread.join()
+         self.assertEqual(result, b"proxied data\n")
+ 
++    def test_large_content_length(self):
++        serv = socket.create_server((HOST, 0))
++        self.addCleanup(serv.close)
++
++        def run_server():
++            [conn, address] = serv.accept()
++            with conn:
++                while conn.recv(1024):
++                    conn.sendall(
++                        b"HTTP/1.1 200 Ok\r\n"
++                        b"Content-Length: %d\r\n"
++                        b"\r\n" % size)
++                    conn.sendall(b'A' * (size//3))
++                    conn.sendall(b'B' * (size - size//3))
++
++        thread = threading.Thread(target=run_server)
++        thread.start()
++        self.addCleanup(thread.join, 1.0)
++
++        conn = client.HTTPConnection(*serv.getsockname())
++        try:
++            for w in range(15, 27):
++                size = 1 << w
++                conn.request("GET", "/")
++                with conn.getresponse() as response:
++                    self.assertEqual(len(response.read()), size)
++        finally:
++            conn.close()
++            thread.join(1.0)
++
++    def test_large_content_length_truncated(self):
++        serv = socket.create_server((HOST, 0))
++        self.addCleanup(serv.close)
++
++        def run_server():
++            while True:
++                [conn, address] = serv.accept()
++                with conn:
++                    conn.recv(1024)
++                    if not size:
++                        break
++                    conn.sendall(
++                        b"HTTP/1.1 200 Ok\r\n"
++                        b"Content-Length: %d\r\n"
++                        b"\r\n"
++                        b"Text" % size)
++
++        thread = threading.Thread(target=run_server)
++        thread.start()
++        self.addCleanup(thread.join, 1.0)
++
++        conn = client.HTTPConnection(*serv.getsockname())
++        try:
++            for w in range(18, 65):
++                size = 1 << w
++                conn.request("GET", "/")
++                with conn.getresponse() as response:
++                    self.assertRaises(client.IncompleteRead, response.read)
++                conn.close()
++        finally:
++            conn.close()
++            size = 0
++            conn.request("GET", "/")
++            conn.close()
++            thread.join(1.0)
++
+     def test_putrequest_override_domain_validation(self):
+         """
+         It should be possible to override the default validation
+diff --git a/Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst b/Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst
+new file mode 100644
+index 00000000000000..6d6f25cd2f8bf7
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst
+@@ -0,0 +1,5 @@
++Fix a potential memory denial of service in the :mod:`http.client` module.
++When connecting to a malicious server, it could cause
++an arbitrary amount of memory to be allocated.
++This could have led to symptoms including a :exc:`MemoryError`, swapping, out
++of memory (OOM) killed processes or containers, or even system crashes.

CVE-2025-13837-plistlib-mailicious-length.patch

@@ -0,0 +1,160 @@
+From aa9edbb11a2bf7805fd5046cdd5c2d3864aa39f2 Mon Sep 17 00:00:00 2001
+From: Serhiy Storchaka <storchaka@gmail.com>
+Date: Mon, 1 Dec 2025 17:28:15 +0200
+Subject: [PATCH] [3.11] gh-119342: Fix a potential denial of service in
+ plistlib (GH-119343)
+
+Reading a specially prepared small Plist file could cause OOM because file's
+read(n) preallocates a bytes object for reading the specified amount of
+data. Now plistlib reads large data by chunks, therefore the upper limit of
+consumed memory is proportional to the size of the input file.
+(cherry picked from commit 694922cf40aa3a28f898b5f5ee08b71b4922df70)
+
+Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
+---
+ Lib/plistlib.py                               | 31 ++++++++++------
+ Lib/test/test_plistlib.py                     | 37 +++++++++++++++++--
+ ...-05-21-22-11-31.gh-issue-119342.BTFj4Z.rst |  5 +++
+ 3 files changed, 59 insertions(+), 14 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2024-05-21-22-11-31.gh-issue-119342.BTFj4Z.rst
+
+diff --git a/Lib/plistlib.py b/Lib/plistlib.py
+index 53e718f063b3ec..63fefbd5f6d499 100644
+--- a/Lib/plistlib.py
++++ b/Lib/plistlib.py
+@@ -73,6 +73,9 @@
+ PlistFormat = enum.Enum('PlistFormat', 'FMT_XML FMT_BINARY', module=__name__)
+ globals().update(PlistFormat.__members__)
+ 
++# Data larger than this will be read in chunks, to prevent extreme
++# overallocation.
++_MIN_READ_BUF_SIZE = 1 << 20
+ 
+ class UID:
+     def __init__(self, data):
+@@ -499,12 +502,24 @@ def _get_size(self, tokenL):
+ 
+         return tokenL
+ 
++    def _read(self, size):
++        cursize = min(size, _MIN_READ_BUF_SIZE)
++        data = self._fp.read(cursize)
++        while True:
++            if len(data) != cursize:
++                raise InvalidFileException
++            if cursize == size:
++                return data
++            delta = min(cursize, size - cursize)
++            data += self._fp.read(delta)
++            cursize += delta
++
+     def _read_ints(self, n, size):
+-        data = self._fp.read(size * n)
++        data = self._read(size * n)
+         if size in _BINARY_FORMAT:
+             return struct.unpack(f'>{n}{_BINARY_FORMAT[size]}', data)
+         else:
+-            if not size or len(data) != size * n:
++            if not size:
+                 raise InvalidFileException()
+             return tuple(int.from_bytes(data[i: i + size], 'big')
+                          for i in range(0, size * n, size))
+@@ -561,22 +576,16 @@ def _read_object(self, ref):
+ 
+         elif tokenH == 0x40:  # data
+             s = self._get_size(tokenL)
+-            result = self._fp.read(s)
+-            if len(result) != s:
+-                raise InvalidFileException()
++            result = self._read(s)
+ 
+         elif tokenH == 0x50:  # ascii string
+             s = self._get_size(tokenL)
+-            data = self._fp.read(s)
+-            if len(data) != s:
+-                raise InvalidFileException()
++            data = self._read(s)
+             result = data.decode('ascii')
+ 
+         elif tokenH == 0x60:  # unicode string
+             s = self._get_size(tokenL) * 2
+-            data = self._fp.read(s)
+-            if len(data) != s:
+-                raise InvalidFileException()
++            data = self._read(s)
+             result = data.decode('utf-16be')
+ 
+         elif tokenH == 0x80:  # UID
+diff --git a/Lib/test/test_plistlib.py b/Lib/test/test_plistlib.py
+index 95b7a649774dca..2bc64afdbe932f 100644
+--- a/Lib/test/test_plistlib.py
++++ b/Lib/test/test_plistlib.py
+@@ -841,8 +841,7 @@ def test_xml_plist_with_entity_decl(self):
+ 
+ class TestBinaryPlistlib(unittest.TestCase):
+ 
+-    @staticmethod
+-    def decode(*objects, offset_size=1, ref_size=1):
++    def build(self, *objects, offset_size=1, ref_size=1):
+         data = [b'bplist00']
+         offset = 8
+         offsets = []
+@@ -854,7 +853,11 @@ def decode(*objects, offset_size=1, ref_size=1):
+                            len(objects), 0, offset)
+         data.extend(offsets)
+         data.append(tail)
+-        return plistlib.loads(b''.join(data), fmt=plistlib.FMT_BINARY)
++        return b''.join(data)
++
++    def decode(self, *objects, offset_size=1, ref_size=1):
++        data = self.build(*objects, offset_size=offset_size, ref_size=ref_size)
++        return plistlib.loads(data, fmt=plistlib.FMT_BINARY)
+ 
+     def test_nonstandard_refs_size(self):
+         # Issue #21538: Refs and offsets are 24-bit integers
+@@ -963,6 +966,34 @@ def test_invalid_binary(self):
+                 with self.assertRaises(plistlib.InvalidFileException):
+                     plistlib.loads(b'bplist00' + data, fmt=plistlib.FMT_BINARY)
+ 
++    def test_truncated_large_data(self):
++        self.addCleanup(os_helper.unlink, os_helper.TESTFN)
++        def check(data):
++            with open(os_helper.TESTFN, 'wb') as f:
++                f.write(data)
++            # buffered file
++            with open(os_helper.TESTFN, 'rb') as f:
++                with self.assertRaises(plistlib.InvalidFileException):
++                    plistlib.load(f, fmt=plistlib.FMT_BINARY)
++            # unbuffered file
++            with open(os_helper.TESTFN, 'rb', buffering=0) as f:
++                with self.assertRaises(plistlib.InvalidFileException):
++                    plistlib.load(f, fmt=plistlib.FMT_BINARY)
++        for w in range(20, 64):
++            s = 1 << w
++            # data
++            check(self.build(b'\x4f\x13' + s.to_bytes(8, 'big')))
++            # ascii string
++            check(self.build(b'\x5f\x13' + s.to_bytes(8, 'big')))
++            # unicode string
++            check(self.build(b'\x6f\x13' + s.to_bytes(8, 'big')))
++            # array
++            check(self.build(b'\xaf\x13' + s.to_bytes(8, 'big')))
++            # dict
++            check(self.build(b'\xdf\x13' + s.to_bytes(8, 'big')))
++            # number of objects
++            check(b'bplist00' + struct.pack('>6xBBQQQ', 1, 1, s, 0, 8))
++
+ 
+ class TestKeyedArchive(unittest.TestCase):
+     def test_keyed_archive_data(self):
+diff --git a/Misc/NEWS.d/next/Security/2024-05-21-22-11-31.gh-issue-119342.BTFj4Z.rst b/Misc/NEWS.d/next/Security/2024-05-21-22-11-31.gh-issue-119342.BTFj4Z.rst
+new file mode 100644
+index 00000000000000..04fd8faca4cf7e
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2024-05-21-22-11-31.gh-issue-119342.BTFj4Z.rst
+@@ -0,0 +1,5 @@
++Fix a potential memory denial of service in the :mod:`plistlib` module.
++When reading a Plist file received from untrusted source, it could cause
++an arbitrary amount of memory to be allocated.
++This could have led to symptoms including a :exc:`MemoryError`, swapping, out
++of memory (OOM) killed processes or containers, or even system crashes.

CVE-2025-15282-urllib-ctrl-chars.patch

@@ -0,0 +1,65 @@
+From 66c966a2d07cfcf555117309ef6aa088001bc487 Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Tue, 20 Jan 2026 14:45:58 -0600
+Subject: [PATCH] [3.11] gh-143925: Reject control characters in data: URL
+ mediatypes (cherry picked from commit
+ f25509e78e8be6ea73c811ac2b8c928c28841b9f) (cherry picked from commit
+ 2c9c746077d8119b5bcf5142316992e464594946)
+
+Co-authored-by: Seth Michael Larson <seth@python.org>
+---
+ Lib/test/test_urllib.py                                   | 8 ++++++++
+ Lib/urllib/request.py                                     | 5 +++++
+ .../2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst        | 1 +
+ 3 files changed, 14 insertions(+)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst
+
+diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
+index f067560ca6caa1..497372a38e392a 100644
+--- a/Lib/test/test_urllib.py
++++ b/Lib/test/test_urllib.py
+@@ -12,6 +12,7 @@
+ from test.support import os_helper
+ from test.support import socket_helper
+ from test.support import warnings_helper
++from test.support import control_characters_c0
+ import os
+ try:
+     import ssl
+@@ -683,6 +684,13 @@ def test_invalid_base64_data(self):
+         # missing padding character
+         self.assertRaises(ValueError,urllib.request.urlopen,'data:;base64,Cg=')
+ 
++    def test_invalid_mediatype(self):
++        for c0 in control_characters_c0():
++            self.assertRaises(ValueError,urllib.request.urlopen,
++                              f'data:text/html;{c0},data')
++        for c0 in control_characters_c0():
++            self.assertRaises(ValueError,urllib.request.urlopen,
++                              f'data:text/html{c0};base64,ZGF0YQ==')
+ 
+ class urlretrieve_FileTests(unittest.TestCase):
+     """Test urllib.urlretrieve() on local files"""
+diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
+index d98ba5dd1983b9..3abb7ae1b049b7 100644
+--- a/Lib/urllib/request.py
++++ b/Lib/urllib/request.py
+@@ -1654,6 +1654,11 @@ def data_open(self, req):
+         scheme, data = url.split(":",1)
+         mediatype, data = data.split(",",1)
+ 
++        # Disallow control characters within mediatype.
++        if re.search(r"[\x00-\x1F\x7F]", mediatype):
++            raise ValueError(
++                "Control characters not allowed in data: mediatype")
++
+         # even base64 encoded data URLs might be quoted so unquote in any case:
+         data = unquote_to_bytes(data)
+         if mediatype.endswith(";base64"):
+diff --git a/Misc/NEWS.d/next/Security/2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst b/Misc/NEWS.d/next/Security/2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst
+new file mode 100644
+index 00000000000000..46109dfbef3ee7
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2026-01-16-11-51-19.gh-issue-143925.mrtcHW.rst
+@@ -0,0 +1 @@
++Reject control characters in ``data:`` URL media types.

CVE-2025-15366-imap-ctrl-chars.patch

@@ -0,0 +1,38 @@
+From 7485ee5e2cf81d3e5ad0d9c3be73cecd2ab4eec7 Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Fri, 16 Jan 2026 10:54:09 -0600
+Subject: [PATCH 1/2] Add 'test.support' fixture for C0 control characters
+
+---
+ Lib/imaplib.py                                                           |    4 +++-
+ Misc/NEWS.d/next/Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst |    1 +
+ 2 files changed, 4 insertions(+), 1 deletion(-)
+
+Index: Python-3.12.12/Lib/imaplib.py
+===================================================================
+--- Python-3.12.12.orig/Lib/imaplib.py	2026-02-10 22:15:03.417592955 +0100
++++ Python-3.12.12/Lib/imaplib.py	2026-02-10 22:18:02.094605035 +0100
+@@ -132,7 +132,7 @@
+ # We compile these in _mode_xxx.
+ _Literal = br'.*{(?P<size>\d+)}$'
+ _Untagged_status = br'\* (?P<data>\d+) (?P<type>[A-Z-]+)( (?P<data2>.*))?'
+-
++_control_chars = re.compile(b'[\x00-\x1F\x7F]')
+ 
+ 
+ class IMAP4:
+@@ -994,6 +994,8 @@
+             if arg is None: continue
+             if isinstance(arg, str):
+                 arg = bytes(arg, self._encoding)
++            if _control_chars.search(arg):
++                raise ValueError("Control characters not allowed in commands")
+             data = data + b' ' + arg
+ 
+         literal = self.literal
+Index: Python-3.12.12/Misc/NEWS.d/next/Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.12.12/Misc/NEWS.d/next/Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst	2026-02-10 22:18:02.095167966 +0100
+@@ -0,0 +1 @@
++Reject control characters in IMAP commands.

CVE-2025-15367-poplib-ctrl-chars.patch

@@ -0,0 +1,56 @@
+From b6f733b285b1c4f27dacb5c2e1f292c914e8b933 Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Fri, 16 Jan 2026 10:54:09 -0600
+Subject: [PATCH 1/2] Add 'test.support' fixture for C0 control characters
+
+---
+ Lib/poplib.py                                                            |    2 ++
+ Lib/test/test_poplib.py                                                  |    8 ++++++++
+ Misc/NEWS.d/next/Security/2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst |    1 +
+ 3 files changed, 11 insertions(+)
+
+Index: Python-3.11.14/Lib/poplib.py
+===================================================================
+--- Python-3.11.14.orig/Lib/poplib.py	2025-10-09 18:16:55.000000000 +0200
++++ Python-3.11.14/Lib/poplib.py	2026-02-11 23:38:35.281675745 +0100
+@@ -122,6 +122,8 @@
+     def _putcmd(self, line):
+         if self._debugging: print('*cmd*', repr(line))
+         line = bytes(line, self.encoding)
++        if re.search(b'[\x00-\x1F\x7F]', line):
++            raise ValueError('Control characters not allowed in commands')
+         self._putline(line)
+ 
+ 
+Index: Python-3.11.14/Lib/test/test_poplib.py
+===================================================================
+--- Python-3.11.14.orig/Lib/test/test_poplib.py	2025-10-09 18:16:55.000000000 +0200
++++ Python-3.11.14/Lib/test/test_poplib.py	2026-02-11 23:39:24.009682813 +0100
+@@ -16,6 +16,7 @@
+ from test.support import socket_helper
+ from test.support import threading_helper
+ from test.support import warnings_helper
++from test.support import control_characters_c0
+ 
+ 
+ asynchat = warnings_helper.import_deprecated('asynchat')
+@@ -367,6 +368,13 @@
+         self.assertIsNone(self.client.sock)
+         self.assertIsNone(self.client.file)
+ 
++    def test_control_characters(self):
++        for c0 in control_characters_c0():
++            with self.assertRaises(ValueError):
++                self.client.user(f'user{c0}')
++            with self.assertRaises(ValueError):
++                self.client.pass_(f'{c0}pass')
++
+     @requires_ssl
+     def test_stls_capa(self):
+         capa = self.client.capa()
+Index: Python-3.11.14/Misc/NEWS.d/next/Security/2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.11.14/Misc/NEWS.d/next/Security/2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst	2026-02-11 23:38:35.282276228 +0100
+@@ -0,0 +1 @@
++Reject control characters in POP3 commands.

CVE-2025-6075-expandvars-perf-degrad.patch

@@ -0,0 +1,359 @@
+From e717839989908ecea9c1c8f3bd17ec9fb1ac8963 Mon Sep 17 00:00:00 2001
+From: Serhiy Storchaka <storchaka@gmail.com>
+Date: Fri, 31 Oct 2025 15:49:51 +0200
+Subject: [PATCH] [3.11] gh-136065: Fix quadratic complexity in
+ os.path.expandvars() (GH-134952) (cherry picked from commit
+ f029e8db626ddc6e3a3beea4eff511a71aaceb5c)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
+Co-authored-by: Łukasz Langa <lukasz@langa.pl>
+---
+ Lib/ntpath.py                                                            |  126 +++-------
+ Lib/posixpath.py                                                         |   43 +--
+ Lib/test/test_genericpath.py                                             |   14 +
+ Lib/test/test_ntpath.py                                                  |   22 +
+ Misc/NEWS.d/next/Security/2025-05-30-22-33-27.gh-issue-136065.bu337o.rst |    1 
+ 5 files changed, 94 insertions(+), 112 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2025-05-30-22-33-27.gh-issue-136065.bu337o.rst
+
+Index: Python-3.11.14/Lib/ntpath.py
+===================================================================
+--- Python-3.11.14.orig/Lib/ntpath.py	2025-11-15 19:14:27.424009612 +0100
++++ Python-3.11.14/Lib/ntpath.py	2025-11-15 19:14:41.389069009 +0100
+@@ -378,17 +378,23 @@
+ # XXX With COMMAND.COM you can use any characters in a variable name,
+ # XXX except '^|<>='.
+ 
++_varpattern = r"'[^']*'?|%(%|[^%]*%?)|\$(\$|[-\w]+|\{[^}]*\}?)"
++_varsub = None
++_varsubb = None
++
+ def expandvars(path):
+     """Expand shell variables of the forms $var, ${var} and %var%.
+ 
+     Unknown variables are left unchanged."""
+     path = os.fspath(path)
++    global _varsub, _varsubb
+     if isinstance(path, bytes):
+         if b'$' not in path and b'%' not in path:
+             return path
+-        import string
+-        varchars = bytes(string.ascii_letters + string.digits + '_-', 'ascii')
+-        quote = b'\''
++        if not _varsubb:
++            import re
++            _varsubb = re.compile(_varpattern.encode(), re.ASCII).sub
++        sub = _varsubb
+         percent = b'%'
+         brace = b'{'
+         rbrace = b'}'
+@@ -397,94 +403,44 @@
+     else:
+         if '$' not in path and '%' not in path:
+             return path
+-        import string
+-        varchars = string.ascii_letters + string.digits + '_-'
+-        quote = '\''
++        if not _varsub:
++            import re
++            _varsub = re.compile(_varpattern, re.ASCII).sub
++        sub = _varsub
+         percent = '%'
+         brace = '{'
+         rbrace = '}'
+         dollar = '$'
+         environ = os.environ
+-    res = path[:0]
+-    index = 0
+-    pathlen = len(path)
+-    while index < pathlen:
+-        c = path[index:index+1]
+-        if c == quote:   # no expansion within single quotes
+-            path = path[index + 1:]
+-            pathlen = len(path)
+-            try:
+-                index = path.index(c)
+-                res += c + path[:index + 1]
+-            except ValueError:
+-                res += c + path
+-                index = pathlen - 1
+-        elif c == percent:  # variable or '%'
+-            if path[index + 1:index + 2] == percent:
+-                res += c
+-                index += 1
+-            else:
+-                path = path[index+1:]
+-                pathlen = len(path)
+-                try:
+-                    index = path.index(percent)
+-                except ValueError:
+-                    res += percent + path
+-                    index = pathlen - 1
+-                else:
+-                    var = path[:index]
+-                    try:
+-                        if environ is None:
+-                            value = os.fsencode(os.environ[os.fsdecode(var)])
+-                        else:
+-                            value = environ[var]
+-                    except KeyError:
+-                        value = percent + var + percent
+-                    res += value
+-        elif c == dollar:  # variable or '$$'
+-            if path[index + 1:index + 2] == dollar:
+-                res += c
+-                index += 1
+-            elif path[index + 1:index + 2] == brace:
+-                path = path[index+2:]
+-                pathlen = len(path)
+-                try:
+-                    index = path.index(rbrace)
+-                except ValueError:
+-                    res += dollar + brace + path
+-                    index = pathlen - 1
+-                else:
+-                    var = path[:index]
+-                    try:
+-                        if environ is None:
+-                            value = os.fsencode(os.environ[os.fsdecode(var)])
+-                        else:
+-                            value = environ[var]
+-                    except KeyError:
+-                        value = dollar + brace + var + rbrace
+-                    res += value
+-            else:
+-                var = path[:0]
+-                index += 1
+-                c = path[index:index + 1]
+-                while c and c in varchars:
+-                    var += c
+-                    index += 1
+-                    c = path[index:index + 1]
+-                try:
+-                    if environ is None:
+-                        value = os.fsencode(os.environ[os.fsdecode(var)])
+-                    else:
+-                        value = environ[var]
+-                except KeyError:
+-                    value = dollar + var
+-                res += value
+-                if c:
+-                    index -= 1
++
++    def repl(m):
++        lastindex = m.lastindex
++        if lastindex is None:
++            return m[0]
++        name = m[lastindex]
++        if lastindex == 1:
++            if name == percent:
++                return name
++            if not name.endswith(percent):
++                return m[0]
++            name = name[:-1]
+         else:
+-            res += c
+-        index += 1
+-    return res
++            if name == dollar:
++                return name
++            if name.startswith(brace):
++                if not name.endswith(rbrace):
++                    return m[0]
++                name = name[1:-1]
++
++        try:
++            if environ is None:
++                return os.fsencode(os.environ[os.fsdecode(name)])
++            else:
++                return environ[name]
++        except KeyError:
++            return m[0]
++
++    return sub(repl, path)
+ 
+ 
+ # Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A\B.
+Index: Python-3.11.14/Lib/posixpath.py
+===================================================================
+--- Python-3.11.14.orig/Lib/posixpath.py	2025-11-15 19:14:27.465471369 +0100
++++ Python-3.11.14/Lib/posixpath.py	2025-11-15 19:14:41.389334199 +0100
+@@ -287,42 +287,41 @@
+ # This expands the forms $variable and ${variable} only.
+ # Non-existent variables are left unchanged.
+ 
+-_varprog = None
+-_varprogb = None
++_varpattern = r'\$(\w+|\{[^}]*\}?)'
++_varsub = None
++_varsubb = None
+ 
+ def expandvars(path):
+     """Expand shell variables of form $var and ${var}.  Unknown variables
+     are left unchanged."""
+     path = os.fspath(path)
+-    global _varprog, _varprogb
++    global _varsub, _varsubb
+     if isinstance(path, bytes):
+         if b'$' not in path:
+             return path
+-        if not _varprogb:
++        if not _varsubb:
+             import re
+-            _varprogb = re.compile(br'\$(\w+|\{[^}]*\})', re.ASCII)
+-        search = _varprogb.search
++            _varsubb = re.compile(_varpattern.encode(), re.ASCII).sub
++        sub = _varsubb
+         start = b'{'
+         end = b'}'
+         environ = getattr(os, 'environb', None)
+     else:
+         if '$' not in path:
+             return path
+-        if not _varprog:
++        if not _varsub:
+             import re
+-            _varprog = re.compile(r'\$(\w+|\{[^}]*\})', re.ASCII)
+-        search = _varprog.search
++            _varsub = re.compile(_varpattern, re.ASCII).sub
++        sub = _varsub
+         start = '{'
+         end = '}'
+         environ = os.environ
+-    i = 0
+-    while True:
+-        m = search(path, i)
+-        if not m:
+-            break
+-        i, j = m.span(0)
+-        name = m.group(1)
+-        if name.startswith(start) and name.endswith(end):
++
++    def repl(m):
++        name = m[1]
++        if name.startswith(start):
++            if not name.endswith(end):
++                return m[0]
+             name = name[1:-1]
+         try:
+             if environ is None:
+@@ -330,13 +329,11 @@
+             else:
+                 value = environ[name]
+         except KeyError:
+-            i = j
++            return m[0]
+         else:
+-            tail = path[j:]
+-            path = path[:i] + value
+-            i = len(path)
+-            path += tail
+-    return path
++            return value
++
++    return sub(repl, path)
+ 
+ 
+ # Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A/B.
+Index: Python-3.11.14/Lib/test/test_genericpath.py
+===================================================================
+--- Python-3.11.14.orig/Lib/test/test_genericpath.py	2025-11-15 19:14:28.470950071 +0100
++++ Python-3.11.14/Lib/test/test_genericpath.py	2025-11-15 19:14:41.389533528 +0100
+@@ -7,6 +7,7 @@
+ import sys
+ import unittest
+ import warnings
++from test import support
+ from test.support import is_emscripten
+ from test.support import os_helper
+ from test.support import warnings_helper
+@@ -434,6 +435,19 @@
+                   os.fsencode('$bar%s bar' % nonascii))
+             check(b'$spam}bar', os.fsencode('%s}bar' % nonascii))
+ 
++    @support.requires_resource('cpu')
++    def test_expandvars_large(self):
++        expandvars = self.pathmodule.expandvars
++        with os_helper.EnvironmentVarGuard() as env:
++            env.clear()
++            env["A"] = "B"
++            n = 100_000
++            self.assertEqual(expandvars('$A'*n), 'B'*n)
++            self.assertEqual(expandvars('${A}'*n), 'B'*n)
++            self.assertEqual(expandvars('$A!'*n), 'B!'*n)
++            self.assertEqual(expandvars('${A}A'*n), 'BA'*n)
++            self.assertEqual(expandvars('${'*10*n), '${'*10*n)
++
+     def test_abspath(self):
+         self.assertIn("foo", self.pathmodule.abspath("foo"))
+         with warnings.catch_warnings():
+Index: Python-3.11.14/Lib/test/test_ntpath.py
+===================================================================
+--- Python-3.11.14.orig/Lib/test/test_ntpath.py	2025-11-15 19:14:29.042372971 +0100
++++ Python-3.11.14/Lib/test/test_ntpath.py	2025-11-15 19:14:41.389799697 +0100
+@@ -6,8 +6,8 @@
+ import unittest
+ import warnings
+ from ntpath import ALLOW_MISSING
+-from test.support import os_helper
+-from test.support import TestFailed, is_emscripten
++from test import support
++from test.support import os_helper, is_emscripten
+ from test.support.os_helper import FakePath
+ from test import test_genericpath
+ from tempfile import TemporaryFile
+@@ -57,7 +57,7 @@
+     fn = fn.replace("\\", "\\\\")
+     gotResult = eval(fn)
+     if wantResult != gotResult and _norm(wantResult) != _norm(gotResult):
+-        raise TestFailed("%s should return: %s but returned: %s" \
++        raise support.TestFailed("%s should return: %s but returned: %s" \
+               %(str(fn), str(wantResult), str(gotResult)))
+ 
+     # then with bytes
+@@ -73,7 +73,7 @@
+         warnings.simplefilter("ignore", DeprecationWarning)
+         gotResult = eval(fn)
+     if _norm(wantResult) != _norm(gotResult):
+-        raise TestFailed("%s should return: %s but returned: %s" \
++        raise support.TestFailed("%s should return: %s but returned: %s" \
+               %(str(fn), str(wantResult), repr(gotResult)))
+ 
+ 
+@@ -820,6 +820,19 @@
+             check('%spam%bar', '%sbar' % nonascii)
+             check('%{}%bar'.format(nonascii), 'ham%sbar' % nonascii)
+ 
++    @support.requires_resource('cpu')
++    def test_expandvars_large(self):
++        expandvars = ntpath.expandvars
++        with os_helper.EnvironmentVarGuard() as env:
++            env.clear()
++            env["A"] = "B"
++            n = 100_000
++            self.assertEqual(expandvars('%A%'*n), 'B'*n)
++            self.assertEqual(expandvars('%A%A'*n), 'BA'*n)
++            self.assertEqual(expandvars("''"*n + '%%'), "''"*n + '%')
++            self.assertEqual(expandvars("%%"*n), "%"*n)
++            self.assertEqual(expandvars("$$"*n), "$"*n)
++
+     def test_expanduser(self):
+         tester('ntpath.expanduser("test")', 'test')
+ 
+@@ -1090,6 +1103,7 @@
+             self.assertIsInstance(b_final_path, bytes)
+             self.assertGreater(len(b_final_path), 0)
+ 
++
+ class NtCommonTest(test_genericpath.CommonTest, unittest.TestCase):
+     pathmodule = ntpath
+     attributes = ['relpath']
+Index: Python-3.11.14/Misc/NEWS.d/next/Security/2025-05-30-22-33-27.gh-issue-136065.bu337o.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.11.14/Misc/NEWS.d/next/Security/2025-05-30-22-33-27.gh-issue-136065.bu337o.rst	2025-11-15 19:14:41.390091148 +0100
+@@ -0,0 +1 @@
++Fix quadratic complexity in :func:`os.path.expandvars`.

CVE-2026-0672-http-hdr-inject-cookie-Morsel.patch

@@ -0,0 +1,184 @@
+From c2d345e3e4dc8932e85dace6599e5c69a144c748 Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Tue, 20 Jan 2026 15:23:42 -0600
+Subject: [PATCH] gh-143919: Reject control characters in http cookies (cherry
+ picked from commit 95746b3a13a985787ef53b977129041971ed7f70)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Co-authored-by: Seth Michael Larson <seth@python.org>
+Co-authored-by: Bartosz Sławecki <bartosz@ilikepython.com>
+Co-authored-by: sobolevn <mail@sobolevn.me>
+---
+ Doc/library/http.cookies.rst                  |  4 +-
+ Lib/http/cookies.py                           | 25 +++++++--
+ Lib/test/test_http_cookies.py                 | 52 +++++++++++++++++--
+ ...-01-16-11-13-15.gh-issue-143919.kchwZV.rst |  1 +
+ 4 files changed, 73 insertions(+), 9 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst
+
+diff --git a/Doc/library/http.cookies.rst b/Doc/library/http.cookies.rst
+index e91972fe621a48..e2abb31149ff10 100644
+--- a/Doc/library/http.cookies.rst
++++ b/Doc/library/http.cookies.rst
+@@ -272,9 +272,9 @@ The following example demonstrates how to use the :mod:`http.cookies` module.
+    Set-Cookie: chips=ahoy
+    Set-Cookie: vienna=finger
+    >>> C = cookies.SimpleCookie()
+-   >>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=\\012;";')
++   >>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=;";')
+    >>> print(C)
+-   Set-Cookie: keebler="E=everybody; L=\"Loves\"; fudge=\012;"
++   Set-Cookie: keebler="E=everybody; L=\"Loves\"; fudge=;"
+    >>> C = cookies.SimpleCookie()
+    >>> C["oreo"] = "doublestuff"
+    >>> C["oreo"]["path"] = "/"
+diff --git a/Lib/http/cookies.py b/Lib/http/cookies.py
+index 2c1f021d0abede..5cfa7a8072c7f7 100644
+--- a/Lib/http/cookies.py
++++ b/Lib/http/cookies.py
+@@ -87,9 +87,9 @@
+ such trickeries do not confuse it.
+ 
+    >>> C = cookies.SimpleCookie()
+-   >>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=\\012;";')
++   >>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=;";')
+    >>> print(C)
+-   Set-Cookie: keebler="E=everybody; L=\"Loves\"; fudge=\012;"
++   Set-Cookie: keebler="E=everybody; L=\"Loves\"; fudge=;"
+ 
+ Each element of the Cookie also supports all of the RFC 2109
+ Cookie attributes.  Here's an example which sets the Path
+@@ -170,6 +170,15 @@ class CookieError(Exception):
+ })
+ 
+ _is_legal_key = re.compile('[%s]+' % re.escape(_LegalChars)).fullmatch
++_control_character_re = re.compile(r'[\x00-\x1F\x7F]')
++
++
++def _has_control_character(*val):
++    """Detects control characters within a value.
++    Supports any type, as header values can be any type.
++    """
++    return any(_control_character_re.search(str(v)) for v in val)
++
+ 
+ def _quote(str):
+     r"""Quote a string for use in a cookie header.
+@@ -292,12 +301,16 @@ def __setitem__(self, K, V):
+         K = K.lower()
+         if not K in self._reserved:
+             raise CookieError("Invalid attribute %r" % (K,))
++        if _has_control_character(K, V):
++            raise CookieError(f"Control characters are not allowed in cookies {K!r} {V!r}")
+         dict.__setitem__(self, K, V)
+ 
+     def setdefault(self, key, val=None):
+         key = key.lower()
+         if key not in self._reserved:
+             raise CookieError("Invalid attribute %r" % (key,))
++        if _has_control_character(key, val):
++            raise CookieError("Control characters are not allowed in cookies %r %r" % (key, val,))
+         return dict.setdefault(self, key, val)
+ 
+     def __eq__(self, morsel):
+@@ -333,6 +346,9 @@ def set(self, key, val, coded_val):
+             raise CookieError('Attempt to set a reserved key %r' % (key,))
+         if not _is_legal_key(key):
+             raise CookieError('Illegal key %r' % (key,))
++        if _has_control_character(key, val, coded_val):
++            raise CookieError(
++                "Control characters are not allowed in cookies %r %r %r" % (key, val, coded_val,))
+ 
+         # It's a good key, so save it.
+         self._key = key
+@@ -484,7 +500,10 @@ def output(self, attrs=None, header="Set-Cookie:", sep="\015\012"):
+         result = []
+         items = sorted(self.items())
+         for key, value in items:
+-            result.append(value.output(attrs, header))
++            value_output = value.output(attrs, header)
++            if _has_control_character(value_output):
++                raise CookieError("Control characters are not allowed in cookies")
++            result.append(value_output)
+         return sep.join(result)
+ 
+     __str__ = output
+diff --git a/Lib/test/test_http_cookies.py b/Lib/test/test_http_cookies.py
+index 8879902a6e2f41..2438c57ef40458 100644
+--- a/Lib/test/test_http_cookies.py
++++ b/Lib/test/test_http_cookies.py
+@@ -17,10 +17,10 @@ def test_basic(self):
+              'repr': "<SimpleCookie: chips='ahoy' vienna='finger'>",
+              'output': 'Set-Cookie: chips=ahoy\nSet-Cookie: vienna=finger'},
+ 
+-            {'data': 'keebler="E=mc2; L=\\"Loves\\"; fudge=\\012;"',
+-             'dict': {'keebler' : 'E=mc2; L="Loves"; fudge=\012;'},
+-             'repr': '''<SimpleCookie: keebler='E=mc2; L="Loves"; fudge=\\n;'>''',
+-             'output': 'Set-Cookie: keebler="E=mc2; L=\\"Loves\\"; fudge=\\012;"'},
++            {'data': 'keebler="E=mc2; L=\\"Loves\\"; fudge=;"',
++             'dict': {'keebler' : 'E=mc2; L="Loves"; fudge=;'},
++             'repr': '''<SimpleCookie: keebler='E=mc2; L="Loves"; fudge=;'>''',
++             'output': 'Set-Cookie: keebler="E=mc2; L=\\"Loves\\"; fudge=;"'},
+ 
+             # Check illegal cookies that have an '=' char in an unquoted value
+             {'data': 'keebler=E=mc2',
+@@ -517,6 +517,50 @@ def test_repr(self):
+                 r'Set-Cookie: key=coded_val; '
+                 r'expires=\w+, \d+ \w+ \d+ \d+:\d+:\d+ \w+')
+ 
++    def test_control_characters(self):
++        for c0 in support.control_characters_c0():
++            morsel = cookies.Morsel()
++
++            # .__setitem__()
++            with self.assertRaises(cookies.CookieError):
++                morsel[c0] = "val"
++            with self.assertRaises(cookies.CookieError):
++                morsel["path"] = c0
++
++            # .setdefault()
++            with self.assertRaises(cookies.CookieError):
++                morsel.setdefault("path", c0)
++            with self.assertRaises(cookies.CookieError):
++                morsel.setdefault(c0, "val")
++
++            # .set()
++            with self.assertRaises(cookies.CookieError):
++                morsel.set(c0, "val", "coded-value")
++            with self.assertRaises(cookies.CookieError):
++                morsel.set("path", c0, "coded-value")
++            with self.assertRaises(cookies.CookieError):
++                morsel.set("path", "val", c0)
++
++    def test_control_characters_output(self):
++        # Tests that even if the internals of Morsel are modified
++        # that a call to .output() has control character safeguards.
++        for c0 in support.control_characters_c0():
++            morsel = cookies.Morsel()
++            morsel.set("key", "value", "coded-value")
++            morsel._key = c0  # Override private variable.
++            cookie = cookies.SimpleCookie()
++            cookie["cookie"] = morsel
++            with self.assertRaises(cookies.CookieError):
++                cookie.output()
++
++            morsel = cookies.Morsel()
++            morsel.set("key", "value", "coded-value")
++            morsel._coded_value = c0  # Override private variable.
++            cookie = cookies.SimpleCookie()
++            cookie["cookie"] = morsel
++            with self.assertRaises(cookies.CookieError):
++                cookie.output()
++
+ 
+ def load_tests(loader, tests, pattern):
+     tests.addTest(doctest.DocTestSuite(cookies))
+diff --git a/Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst b/Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst
+new file mode 100644
+index 00000000000000..788c3e4ac2ebf7
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst
+@@ -0,0 +1 @@
++Reject control characters in :class:`http.cookies.Morsel` fields and values.

CVE-2026-0865-wsgiref-ctrl-chars.patch

@@ -0,0 +1,178 @@
+From 2c84d7875f35d3d1d0fbc170271227cc95752fa5 Mon Sep 17 00:00:00 2001
+From: "Gregory P. Smith" <68491+gpshead@users.noreply.github.com>
+Date: Sat, 17 Jan 2026 10:23:57 -0800
+Subject: [PATCH] [3.11] gh-143916: Reject control characters in
+ wsgiref.headers.Headers (GH-143917) (GH-143973)
+
+gh-143916: Reject control characters in wsgiref.headers.Headers  (GH-143917)
+
+* Add 'test.support' fixture for C0 control characters
+* gh-143916: Reject control characters in wsgiref.headers.Headers
+
+(cherry picked from commit f7fceed79ca1bceae8dbe5ba5bc8928564da7211)
+(cherry picked from commit 22e4d55285cee52bc4dbe061324e5f30bd4dee58)
+
+Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
+Co-authored-by: Seth Michael Larson <seth@python.org>
+---
+ Lib/test/support/__init__.py                                             |    7 ++
+ Lib/test/test_wsgiref.py                                                 |   18 +++++
+ Lib/wsgiref/headers.py                                                   |   34 ++++++----
+ Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst |    2 
+ 4 files changed, 47 insertions(+), 14 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst
+
+Index: Python-3.11.14/Lib/test/support/__init__.py
+===================================================================
+--- Python-3.11.14.orig/Lib/test/support/__init__.py	2026-02-11 23:22:45.373477280 +0100
++++ Python-3.11.14/Lib/test/support/__init__.py	2026-02-11 23:23:25.641652256 +0100
+@@ -2294,3 +2294,10 @@
+ fails_with_expat_2_6_0 = (unittest.expectedFailure
+                           if is_expat_2_6_0
+                           else lambda test: test)
++
++
++def control_characters_c0() -> list[str]:
++    """Returns a list of C0 control characters as strings.
++    C0 control characters defined as the byte range 0x00-0x1F, and 0x7F.
++    """
++    return [chr(c) for c in range(0x00, 0x20)] + ["\x7F"]
+Index: Python-3.11.14/Lib/test/test_wsgiref.py
+===================================================================
+--- Python-3.11.14.orig/Lib/test/test_wsgiref.py	2026-02-11 23:22:38.512011986 +0100
++++ Python-3.11.14/Lib/test/test_wsgiref.py	2026-02-11 23:24:19.545119499 +0100
+@@ -1,6 +1,6 @@
+ from unittest import mock
+ from test import support
+-from test.support import socket_helper
++from test.support import socket_helper, control_characters_c0
+ from test.test_httpservers import NoLogRequestHandler
+ from unittest import TestCase
+ from wsgiref.util import setup_testing_defaults
+@@ -503,6 +503,22 @@
+             '\r\n'
+         )
+ 
++    def testRaisesControlCharacters(self):
++        for c0 in control_characters_c0():
++            with self.subTest(c0):
++                headers = Headers()
++                self.assertRaises(ValueError, headers.__setitem__, f"key{c0}", "val")
++                self.assertRaises(ValueError, headers.add_header, f"key{c0}", "val", param="param")
++                # HTAB (\x09) is allowed in values, not names.
++                if c0 == "\t":
++                    headers["key"] = f"val{c0}"
++                    headers.add_header("key", f"val{c0}")
++                    headers.setdefault(f"key", f"val{c0}")
++                else:
++                    self.assertRaises(ValueError, headers.__setitem__, "key", f"val{c0}")
++                    self.assertRaises(ValueError, headers.add_header, "key", f"val{c0}", param="param")
++                    self.assertRaises(ValueError, headers.add_header, "key", "val", param=f"param{c0}")
++
+ class ErrorHandler(BaseCGIHandler):
+     """Simple handler subclass for testing BaseHandler"""
+ 
+Index: Python-3.11.14/Lib/wsgiref/headers.py
+===================================================================
+--- Python-3.11.14.orig/Lib/wsgiref/headers.py	2026-02-11 23:22:38.927685306 +0100
++++ Python-3.11.14/Lib/wsgiref/headers.py	2026-02-11 23:24:19.545709612 +0100
+@@ -9,6 +9,11 @@
+ # existence of which force quoting of the parameter value.
+ import re
+ tspecials = re.compile(r'[ \(\)<>@,;:\\"/\[\]\?=]')
++# Disallowed characters for headers and values.
++# HTAB (\x09) is allowed in header values, but
++# not in header names. (RFC 9110 Section 5.5)
++_name_disallowed_re = re.compile(r'[\x00-\x1F\x7F]')
++_value_disallowed_re = re.compile(r'[\x00-\x08\x0A-\x1F\x7F]')
+ 
+ def _formatparam(param, value=None, quote=1):
+     """Convenience function to format and return a key=value pair.
+@@ -35,12 +40,15 @@
+         self._headers = headers
+         if __debug__:
+             for k, v in headers:
+-                self._convert_string_type(k)
+-                self._convert_string_type(v)
++                self._convert_string_type(k, name=True)
++                self._convert_string_type(v, name=False)
+ 
+-    def _convert_string_type(self, value):
++    def _convert_string_type(self, value, *, name):
+         """Convert/check value type."""
+         if type(value) is str:
++            regex = (_name_disallowed_re if name else _value_disallowed_re)
++            if regex.search(value):
++                raise ValueError("Control characters not allowed in headers")
+             return value
+         raise AssertionError("Header names/values must be"
+             " of type str (got {0})".format(repr(value)))
+@@ -53,14 +61,14 @@
+         """Set the value of a header."""
+         del self[name]
+         self._headers.append(
+-            (self._convert_string_type(name), self._convert_string_type(val)))
++            (self._convert_string_type(name, name=True), self._convert_string_type(val, name=False)))
+ 
+     def __delitem__(self,name):
+         """Delete all occurrences of a header, if present.
+ 
+         Does *not* raise an exception if the header is missing.
+         """
+-        name = self._convert_string_type(name.lower())
++        name = self._convert_string_type(name.lower(), name=True)
+         self._headers[:] = [kv for kv in self._headers if kv[0].lower() != name]
+ 
+     def __getitem__(self,name):
+@@ -87,13 +95,13 @@
+         fields deleted and re-inserted are always appended to the header list.
+         If no fields exist with the given name, returns an empty list.
+         """
+-        name = self._convert_string_type(name.lower())
++        name = self._convert_string_type(name.lower(), name=True)
+         return [kv[1] for kv in self._headers if kv[0].lower()==name]
+ 
+ 
+     def get(self,name,default=None):
+         """Get the first header value for 'name', or return 'default'"""
+-        name = self._convert_string_type(name.lower())
++        name = self._convert_string_type(name.lower(), name=True)
+         for k,v in self._headers:
+             if k.lower()==name:
+                 return v
+@@ -148,8 +156,8 @@
+         and value 'value'."""
+         result = self.get(name)
+         if result is None:
+-            self._headers.append((self._convert_string_type(name),
+-                self._convert_string_type(value)))
++            self._headers.append((self._convert_string_type(name, name=True),
++                self._convert_string_type(value, name=False)))
+             return value
+         else:
+             return result
+@@ -172,13 +180,13 @@
+         """
+         parts = []
+         if _value is not None:
+-            _value = self._convert_string_type(_value)
++            _value = self._convert_string_type(_value, name=False)
+             parts.append(_value)
+         for k, v in _params.items():
+-            k = self._convert_string_type(k)
++            k = self._convert_string_type(k, name=True)
+             if v is None:
+                 parts.append(k.replace('_', '-'))
+             else:
+-                v = self._convert_string_type(v)
++                v = self._convert_string_type(v, name=False)
+                 parts.append(_formatparam(k.replace('_', '-'), v))
+-        self._headers.append((self._convert_string_type(_name), "; ".join(parts)))
++        self._headers.append((self._convert_string_type(_name, name=True), "; ".join(parts)))
+Index: Python-3.11.14/Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.11.14/Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst	2026-02-11 23:22:49.891193395 +0100
+@@ -0,0 +1,2 @@
++Reject C0 control characters within wsgiref.headers.Headers fields, values,
++and parameters.

fix_configure_rst.patch

@@ -3,9 +3,11 @@
  Misc/NEWS               |    2 +-
  2 files changed, 1 insertion(+), 4 deletions(-)
 
---- a/Doc/using/configure.rst
+Index: Python-3.11.14/Doc/using/configure.rst
-+++ b/Doc/using/configure.rst
+===================================================================
-@@ -43,7 +43,6 @@ General Options
+--- Python-3.11.14.orig/Doc/using/configure.rst	2025-11-15 19:14:54.096952433 +0100
++++ Python-3.11.14/Doc/using/configure.rst	2025-11-15 19:15:04.439920979 +0100
+@@ -43,7 +43,6 @@
  
     See :data:`sys.int_info.bits_per_digit <sys.int_info>`.
  
@@ -13,7 +15,7 @@
  .. option:: --with-cxx-main=COMPILER
  
     Compile the Python ``main()`` function and link Python executable with C++
-@@ -529,13 +528,11 @@ macOS Options
+@@ -529,13 +528,11 @@
  
  See ``Mac/README.rst``.
  
@@ -27,9 +29,11 @@
  .. option:: --enable-framework=INSTALLDIR
  
     Create a Python.framework rather than a traditional Unix install. Optional
---- a/Misc/NEWS
+Index: Python-3.11.14/Misc/NEWS
-+++ b/Misc/NEWS
+===================================================================
-@@ -9911,7 +9911,7 @@ C API
+--- Python-3.11.14.orig/Misc/NEWS	2025-11-15 19:14:54.096952433 +0100
++++ Python-3.11.14/Misc/NEWS	2025-11-15 19:15:04.445942414 +0100
+@@ -9987,7 +9987,7 @@
  - bpo-40939: Removed documentation for the removed ``PyParser_*`` C API.
  
  - bpo-43795: The list in :ref:`limited-api-list` now shows the public name

python311.changes

@@ -1,3 +1,55 @@
+-------------------------------------------------------------------
+Wed Feb 11 19:09:06 CET 2026 - Matej Cepl <mcepl@suse.com>
+
+- CVE-2025-11468: preserving parens when folding comments in
+  email headers (bsc#1257029, gh#python/cpython#143935).
+  CVE-2025-11468-email-hdr-fold-comment.patch
+- CVE-2026-0672: rejects control characters in http cookies.
+  (bsc#1257031, gh#python/cpython#143919)
+  CVE-2026-0672-http-hdr-inject-cookie-Morsel.patch
+- CVE-2026-0865: rejecting control characters in
+  wsgiref.headers.Headers, which could be abused for injecting
+  false HTTP headers. (bsc#1257042, gh#python/cpython#143916)
+  CVE-2026-0865-wsgiref-ctrl-chars.patch
+- CVE-2025-15366: basically the same as the previous patch for
+  IMAP protocol. (bsc#1257044, gh#python/cpython#143921)
+  CVE-2025-15366-imap-ctrl-chars.patch
+- CVE-2025-15282: basically the same as the previous patch for
+  urllib library. (bsc#1257046, gh#python/cpython#143925)
+  CVE-2025-15282-urllib-ctrl-chars.patch
+- CVE-2025-15367: basically the same as the previous patch for
+  poplib library. (bsc#1257041, gh#python/cpython#143923)
+  CVE-2025-15367-poplib-ctrl-chars.patch
+- CVE-2025-12781: fix decoding with non-standard Base64 alphabet
+  (bsc#1257108, gh#python/cpython#125346)
+  CVE-2025-12781-b64decode-alt-chars.patch
+
+-------------------------------------------------------------------
+Thu Dec 18 10:33:44 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
+
+- Add CVE-2025-13836-http-resp-cont-len.patch (bsc#1254400,
+  CVE-2025-13836) to prevent reading an HTTP response from
+  a server, if no read amount is specified, with using
+  Content-Length per default as the length.
+- Add CVE-2025-12084-minidom-quad-search.patch prevent quadratic
+  behavior in node ID cache clearing (CVE-2025-12084,
+  bsc#1254997).
+- Add CVE-2025-13837-plistlib-mailicious-length.patch protect
+  against OOM when loading malicious content (CVE-2025-13837,
+  bsc#1254401).
+
+-------------------------------------------------------------------
+Thu Nov 13 17:13:03 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
+
+- Add CVE-2025-6075-expandvars-perf-degrad.patch avoid simple
+  quadratic complexity vulnerabilities of os.path.expandvars()
+  (CVE-2025-6075, bsc#1252974).
+- Readjusted patches:
+  - CVE-2023-52425-libexpat-2.6.0-backport.patch
+  - CVE-2023-52425-remove-reparse_deferral-tests.patch
+  - fix_configure_rst.patch
+  - skip_if_buildbot-extend.patch
+
 -------------------------------------------------------------------
 Wed Oct 15 08:52:35 UTC 2025 - Daniel Garcia <daniel.garcia@suse.com>
 

python311.spec

@@ -188,6 +188,40 @@ Patch22:        gh120226-fix-sendfile-test-kernel-610.patch
 Patch24:        add-loongarch64-support.patch
 # PATCH-FIX-OPENSUSE gh139257-Support-docutils-0.22.patch gh#python/cpython#139257 daniel.garcia@suse.com
 Patch25:        gh139257-Support-docutils-0.22.patch
+# PATCH-FIX-UPSTREAM CVE-2025-6075-expandvars-perf-degrad.patch bsc#1252974 mcepl@suse.com
+# Avoid potential quadratic complexity vulnerabilities in path modules
+Patch26:        CVE-2025-6075-expandvars-perf-degrad.patch
+# PATCH-FIX-UPSTREAM CVE-2025-13836-http-resp-cont-len.patch bsc#1254400 mcepl@suse.com
+# Avoid loading possibly compromised length of HTTP response
+Patch27:        CVE-2025-13836-http-resp-cont-len.patch
+# PATCH-FIX-UPSTREAM CVE-2025-12084-minidom-quad-search.patch bsc#1254997 mcepl@suse.com
+# prevent quadratic behavior in node ID cache clearing 
+Patch28:        CVE-2025-12084-minidom-quad-search.patch
+# PATCH-FIX-UPSTREAM CVE-2025-13837-plistlib-mailicious-length.patch bsc#1254401 mcepl@suse.com
+# protect against OOM when loading malicious content
+Patch29:        CVE-2025-13837-plistlib-mailicious-length.patch 
+# PATCH-FIX-UPSTREAM CVE-2025-11468-email-hdr-fold-comment.patch bsc#1257029 mcepl@suse.com
+# this patch makes things totally awesome
+Patch30:        CVE-2025-11468-email-hdr-fold-comment.patch
+# PATCH-FIX-UPSTREAM CVE-2026-0672-http-hdr-inject-cookie-Morsel.patch bsc#1257031 mcepl@suse.com
+# rejects control characters in http cookies.
+Patch31:        CVE-2026-0672-http-hdr-inject-cookie-Morsel.patch
+# PATCH-FIX-UPSTREAM CVE-2026-0865-wsgiref-ctrl-chars.patch bsc#1257042 mcepl@suse.com
+# Reject control characters in wsgiref.headers.Headers
+Patch32:        CVE-2026-0865-wsgiref-ctrl-chars.patch
+# PATCH-FIX-UPSTREAM CVE-2025-15366-imap-ctrl-chars.patch bsc#1257044 mcepl@suse.com
+# Reject control characters in wsgiref.headers.Headers
+Patch33:        CVE-2025-15366-imap-ctrl-chars.patch
+# PATCH-FIX-UPSTREAM CVE-2025-15282-urllib-ctrl-chars.patch bsc#1257046 mcepl@suse.com
+# Reject control characters in urllib
+Patch34:        CVE-2025-15282-urllib-ctrl-chars.patch
+# PATCH-FIX-UPSTREAM CVE-2025-15367-poplib-ctrl-chars.patch bsc#1257041 mcepl@suse.com
+# Reject control characters in poplib
+Patch35:        CVE-2025-15367-poplib-ctrl-chars.patch
+# PATCH-FIX-UPSTREAM CVE-2025-12781-b64decode-alt-chars.patch bsc#1257108 mcepl@suse.com
+# Fix decoding with non-standard Base64 alphabet gh#python/cpython#125346
+Patch36:        CVE-2025-12781-b64decode-alt-chars.patch
+### END OF PATCHES
 BuildRequires:  autoconf-archive
 BuildRequires:  automake
 BuildRequires:  crypto-policies-scripts
@@ -543,6 +577,9 @@ LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH \
 %check
 export SUSE_VERSION="0%{?suse_version}"
 export SLE_VERSION="0%{?sle_version}"
+echo "Show the openssl version"
+openssl version -a
+echo ""
 %if %{with general}
 # exclude test_gdb -- it doesn't run in buildservice anyway, and fails on missing debuginfos
 # when you install gdb into your test env

skip_if_buildbot-extend.patch

@@ -2,9 +2,11 @@
  Lib/test/support/__init__.py |    2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)
 
---- a/Lib/test/support/__init__.py
+Index: Python-3.11.14/Lib/test/support/__init__.py
-+++ b/Lib/test/support/__init__.py
+===================================================================
-@@ -384,7 +384,7 @@ def skip_if_buildbot(reason=None):
+--- Python-3.11.14.orig/Lib/test/support/__init__.py	2025-11-15 19:14:54.049952478 +0100
++++ Python-3.11.14/Lib/test/support/__init__.py	2025-11-15 19:15:08.449938538 +0100
+@@ -394,7 +394,7 @@
      if not reason:
          reason = 'not suitable for buildbots'
      try: