Fixing bsc#1257108 (CVE-2025-12781)

Add CVE-2025-12781-b64decode-alt-chars.patch fixing bsc#1257108
  (CVE-2025-12781) combining gh#python/cpython!141061,
  gh#python/cpython!141128, and gh#python/cpython!141153. All
  `*b64decode` functions should not accept non-altchars.

CVE-2024-6923-follow-up-EOL-email-headers.patch

@@ -0,0 +1,104 @@
+From 5a8bfd878f086e28f0849bbc3970ad92f6ba37dc Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Fri, 23 Jan 2026 08:59:35 -0600
+Subject: [PATCH] gh-144125: email: verify headers are sound in BytesGenerator
+ (cherry picked from commit 052e55e7d44718fe46cbba0ca995cb8fcc359413)
+
+Co-authored-by: Seth Michael Larson <seth@python.org>
+Co-authored-by: Denis Ledoux <dle@odoo.com>
+Co-authored-by: Denis Ledoux <5822488+beledouxdenis@users.noreply.github.com>
+Co-authored-by: Petr Viktorin <302922+encukou@users.noreply.github.com>
+Co-authored-by: Bas Bloemsaat <1586868+basbloemsaat@users.noreply.github.com>
+---
+ Lib/email/generator.py                                                   |   12 +++++++++-
+ Lib/test/test_email/test_generator.py                                    |    4 ++-
+ Lib/test/test_email/test_policy.py                                       |    6 ++++-
+ Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst |    4 +++
+ 4 files changed, 23 insertions(+), 3 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst
+
+Index: Python-3.14.2/Lib/email/generator.py
+===================================================================
+--- Python-3.14.2.orig/Lib/email/generator.py	2026-01-28 22:15:51.075267925 +0100
++++ Python-3.14.2/Lib/email/generator.py	2026-01-28 22:15:56.251194626 +0100
+@@ -22,6 +22,7 @@
+ NLCRE = re.compile(r'\r\n|\r|\n')
+ fcre = re.compile(r'^From ', re.MULTILINE)
+ NEWLINE_WITHOUT_FWSP = re.compile(r'\r\n[^ \t]|\r[^ \n\t]|\n[^ \t]')
++NEWLINE_WITHOUT_FWSP_BYTES = re.compile(br'\r\n[^ \t]|\r[^ \n\t]|\n[^ \t]')
+ 
+ 
+ class Generator:
+@@ -429,7 +430,16 @@
+         # This is almost the same as the string version, except for handling
+         # strings with 8bit bytes.
+         for h, v in msg.raw_items():
+-            self._fp.write(self.policy.fold_binary(h, v))
++            folded = self.policy.fold_binary(h, v)
++            if self.policy.verify_generated_headers:
++                linesep = self.policy.linesep.encode()
++                if not folded.endswith(linesep):
++                    raise HeaderWriteError(
++                        f'folded header does not end with {linesep!r}: {folded!r}')
++                if NEWLINE_WITHOUT_FWSP_BYTES.search(folded.removesuffix(linesep)):
++                    raise HeaderWriteError(
++                        f'folded header contains newline: {folded!r}')
++            self._fp.write(folded)
+         # A blank line always separates headers from body
+         self.write(self._NL)
+ 
+Index: Python-3.14.2/Lib/test/test_email/test_generator.py
+===================================================================
+--- Python-3.14.2.orig/Lib/test/test_email/test_generator.py	2026-01-28 22:15:52.693627763 +0100
++++ Python-3.14.2/Lib/test/test_email/test_generator.py	2026-01-28 22:15:56.251344799 +0100
+@@ -313,7 +313,7 @@
+         self.assertEqual(s.getvalue(), self.typ(expected))
+ 
+     def test_verify_generated_headers(self):
+-        """gh-121650: by default the generator prevents header injection"""
++        # gh-121650: by default the generator prevents header injection
+         class LiteralHeader(str):
+             name = 'Header'
+             def fold(self, **kwargs):
+@@ -334,6 +334,8 @@
+ 
+                 with self.assertRaises(email.errors.HeaderWriteError):
+                     message.as_string()
++                with self.assertRaises(email.errors.HeaderWriteError):
++                    message.as_bytes()
+ 
+ 
+ class TestBytesGenerator(TestGeneratorBase, TestEmailBase):
+Index: Python-3.14.2/Lib/test/test_email/test_policy.py
+===================================================================
+--- Python-3.14.2.orig/Lib/test/test_email/test_policy.py	2026-01-28 22:15:52.703671956 +0100
++++ Python-3.14.2/Lib/test/test_email/test_policy.py	2026-01-28 22:15:56.251499922 +0100
+@@ -296,7 +296,7 @@
+                     policy.fold("Subject", subject)
+ 
+     def test_verify_generated_headers(self):
+-        """Turning protection off allows header injection"""
++        # Turning protection off allows header injection
+         policy = email.policy.default.clone(verify_generated_headers=False)
+         for text in (
+             'Header: Value\r\nBad: Injection\r\n',
+@@ -319,6 +319,10 @@
+                     message.as_string(),
+                     f"{text}\nBody",
+                 )
++                self.assertEqual(
++                    message.as_bytes(),
++                    f"{text}\nBody".encode(),
++                )
+ 
+     # XXX: Need subclassing tests.
+     # For adding subclassed objects, make sure the usual rules apply (subclass
+Index: Python-3.14.2/Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.14.2/Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst	2026-01-28 22:15:56.251667056 +0100
+@@ -0,0 +1,4 @@
++:mod:`~email.generator.BytesGenerator` will now refuse to serialize (write) headers
++that are unsafely folded or delimited; see
++:attr:`~email.policy.Policy.verify_generated_headers`. (Contributed by Bas
++Bloemsaat and Petr Viktorin in :gh:`121650`).

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

@@ -0,0 +1,109 @@
+From df45bd1aafc3b6792d43661207d2b7eb3a14d214 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 68c2cf9585c5b4..51727688c059ed 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}"'
+@@ -939,7 +945,7 @@ def value(self):
+         return ' '
+ 
+     def startswith_fws(self):
+-        return True
++        return self and self[0] in WSP
+ 
+ 
+ class ValueTerminal(Terminal):
+@@ -2959,6 +2965,13 @@ 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 426ec4644e3096..e28fe3892015b9 100644
+--- a/Lib/test/test_email/test__header_value_parser.py
++++ b/Lib/test/test_email/test__header_value_parser.py
+@@ -3294,6 +3294,29 @@ 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-2025-12781-b64decode-alt-chars.patch

@@ -0,0 +1,196 @@
+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                                                 |   45 ++++++++--
+ Misc/NEWS.d/next/Library/2025-11-06-12-03-29.gh-issue-125346.7Gfpgw.rst |    5 +
+ 4 files changed, 91 insertions(+), 17 deletions(-)
+
+Index: Python-3.14.2/Doc/library/base64.rst
+===================================================================
+--- Python-3.14.2.orig/Doc/library/base64.rst	2025-12-05 17:49:16.000000000 +0100
++++ Python-3.14.2/Doc/library/base64.rst	2026-02-03 18:10:52.115333313 +0100
+@@ -77,15 +77,20 @@
+    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)
+ 
+@@ -116,6 +121,9 @@
+    ``/`` 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-3.14.2/Lib/base64.py
+===================================================================
+--- Python-3.14.2.orig/Lib/base64.py	2026-02-03 18:10:42.615516871 +0100
++++ Python-3.14.2/Lib/base64.py	2026-02-03 18:10:52.115801314 +0100
+@@ -69,20 +69,39 @@
+     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):
+@@ -127,8 +146,19 @@
+     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-3.14.2/Lib/test/test_base64.py
+===================================================================
+--- Python-3.14.2.orig/Lib/test/test_base64.py	2026-02-03 18:10:43.960993003 +0100
++++ Python-3.14.2/Lib/test/test_base64.py	2026-02-03 18:10:52.116085599 +0100
+@@ -242,6 +242,25 @@
+             eq(base64.b64decode(data, altchars=altchars_str), res)
+             eq(base64.b64decode(data_str, altchars=altchars_str), res)
+ 
++    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')
+@@ -273,13 +292,25 @@
+             with self.assertRaises(binascii.Error):
+                 base64.b64decode(bstr.decode('ascii'), validate=True)
+ 
+-        # Normal alphabet characters not discarded when alternative given
+-        res = b'\xfb\xef\xff'
+-        self.assertEqual(base64.b64decode(b'++//', validate=True), res)
+-        self.assertEqual(base64.b64decode(b'++//', '-_', validate=True), res)
+-        self.assertEqual(base64.b64decode(b'--__', '-_', validate=True), res)
+-        self.assertEqual(base64.urlsafe_b64decode(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-3.14.2/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-3.14.2/Misc/NEWS.d/next/Library/2025-11-06-12-03-29.gh-issue-125346.7Gfpgw.rst	2026-02-03 18:10:52.116411403 +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-2026-0672-http-hdr-inject-cookie-Morsel.patch

@@ -0,0 +1,209 @@
+From 2bb0ca857e7d2593da6f6936187465a49a63c2d5 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/support/__init__.py                                             |   10 +
+ Lib/test/test_http_cookies.py                                            |   52 +++++++++-
+ Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst |    1 
+ 5 files changed, 82 insertions(+), 10 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst
+
+Index: Python-3.14.2/Doc/library/http.cookies.rst
+===================================================================
+--- Python-3.14.2.orig/Doc/library/http.cookies.rst	2025-12-05 17:49:16.000000000 +0100
++++ Python-3.14.2/Doc/library/http.cookies.rst	2026-01-30 14:25:26.265077841 +0100
+@@ -292,9 +292,9 @@
+    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"] = "/"
+Index: Python-3.14.2/Lib/http/cookies.py
+===================================================================
+--- Python-3.14.2.orig/Lib/http/cookies.py	2026-01-30 14:25:21.316524119 +0100
++++ Python-3.14.2/Lib/http/cookies.py	2026-01-30 14:25:26.265560727 +0100
+@@ -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 @@
+ })
+ 
+ _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.
+@@ -294,12 +303,16 @@
+         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):
+@@ -335,6 +348,9 @@
+             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
+@@ -488,7 +504,10 @@
+         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
+Index: Python-3.14.2/Lib/test/support/__init__.py
+===================================================================
+--- Python-3.14.2.orig/Lib/test/support/__init__.py	2026-01-30 14:25:22.035209804 +0100
++++ Python-3.14.2/Lib/test/support/__init__.py	2026-01-30 14:26:31.354376277 +0100
+@@ -68,7 +68,8 @@
+     "BrokenIter",
+     "in_systemd_nspawn_sync_suppressed",
+     "run_no_yield_async_fn", "run_yielding_async_fn", "async_yield",
+-    "reset_code", "on_github_actions"
++    "reset_code", "on_github_actions",
++    "control_characters_c0",
+     ]
+ 
+ 
+@@ -3185,3 +3186,10 @@
+         return _linked_to_musl
+     _linked_to_musl = tuple(map(int, version.split('.')))
+     return _linked_to_musl
++
++
++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-3.14.2/Lib/test/test_http_cookies.py
+===================================================================
+--- Python-3.14.2.orig/Lib/test/test_http_cookies.py	2026-01-30 14:25:22.919203244 +0100
++++ Python-3.14.2/Lib/test/test_http_cookies.py	2026-01-30 14:25:26.265943668 +0100
+@@ -17,10 +17,10 @@
+              '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',
+@@ -571,6 +571,50 @@
+                 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))
+Index: Python-3.14.2/Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ Python-3.14.2/Misc/NEWS.d/next/Security/2026-01-16-11-13-15.gh-issue-143919.kchwZV.rst	2026-01-30 14:25:26.266224501 +0100
+@@ -0,0 +1 @@
++Reject control characters in :class:`http.cookies.Morsel` fields and values.

python314.changes

@@ -1,3 +1,24 @@
+-------------------------------------------------------------------
+Tue Feb  3 15:39:21 UTC 2026 - Matej Cepl <mcepl@cepl.eu>
+
+- Add CVE-2025-12781-b64decode-alt-chars.patch fixing bsc#1257108
+  (CVE-2025-12781) combining gh#python/cpython!141061,
+  gh#python/cpython!141128, and gh#python/cpython!141153. All
+  `*b64decode` functions should not accept non-altchars.
+
+-------------------------------------------------------------------
+Thu Jan 29 12:58:15 UTC 2026 - Matej Cepl <mcepl@cepl.eu>
+
+- Add CVE-2024-6923-follow-up-EOL-email-headers.patch which is
+  a follow-up to the previous fix of CVE-2024-6923 further
+  encoding EOL possibly hidden in email headers (bsc#1257181).
+- Add CVE-2025-11468-email-hdr-fold-comment.patch preserving
+  parens when folding comments in email headers (bsc#1257029,
+  CVE-2025-11468).
+- Add CVE-2026-0672-http-hdr-inject-cookie-Morsel.patch, which
+  rejects control characters in http cookies (bsc#1257031,
+  CVE-2026-0672).
+
 -------------------------------------------------------------------
 Thu Dec 11 17:37:09 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
 
@@ -4672,7 +4693,8 @@ Sat Sep  7 15:36:03 UTC 2024 - Matej Cepl <mcepl@cepl.eu>
       now refuse to serialize (write) headers
       that are unsafely folded or delimited; see
       verify_generated_headers. (Contributed by Bas Bloemsaat and
-      Petr Viktorin in gh-121650.; CVE-2024-6923, bsc#1228780)
+      Petr Viktorin in gh-121650.; CVE-2024-6923, bsc#1228780,
+      bsc#1257181)
     - gh-121723: Make logging.config.dictConfig() accept any
       object implementing the Queue public API. See the queue
       configuration section for details. Patch by Bénédikt Tran.

python314.spec

@@ -224,7 +224,20 @@ Patch41:        bsc1243155-sphinx-non-determinism.patch
 Patch44:        gh138131-exclude-pycache-from-digest.patch
 # PATCH-FIX-OPENSUSE gh139257-Support-docutils-0.22.patch gh#python/cpython#139257 daniel.garcia@suse.com
 Patch45:        gh139257-Support-docutils-0.22.patch
-#### Python 3.14 DEVELOPMENT PATCHES
+# PATCH-FIX-UPSTREAM CVE-2024-6923-follow-up-EOL-email-headers.patch bsc#1257181 mcepl@suse.com
+# Encode newlines in headers when using ByteGenerator
+# patch from gh#python/cpython#144125
+Patch46:        CVE-2024-6923-follow-up-EOL-email-headers.patch
+# PATCH-FIX-UPSTREAM CVE-2025-11468-email-hdr-fold-comment.patch bsc#1257029 mcepl@suse.com
+# Email preserve parens when folding comments
+Patch47:        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
+# Reject control characters in http cookies
+Patch48:        CVE-2026-0672-http-hdr-inject-cookie-Morsel.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
+Patch49:        CVE-2025-12781-b64decode-alt-chars.patch
+#### Python 3.14 END OF PATCHES
 BuildRequires:  autoconf-archive
 BuildRequires:  automake
 BuildRequires:  fdupes