forked from pool/python311
Matěj Cepl
861a23080f
- Security
- gh-144125: BytesGenerator will 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).
- gh-143935: 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 (bsc#1257029 CVE-2025-11468).
- gh-143925: Reject control characters in data: URL media
types (bsc#1257046, CVE-2025-15282).
- gh-143919: Reject control characters in http.cookies.Morsel
fields and values (bsc#1257031, CVE-2026-0672).
- gh-143916: Reject C0 control characters within
wsgiref.headers.Headers fields, values, and parameters
(bsc#1257042, CVE-2026-0865).
- gh-142145: Remove quadratic behavior in xml.minidom node ID
cache clearing. In order to do this without breaking
existing users, we also add the ownerDocument attribute to
xml.dom.minidom elements and attributes created by directly
instantiating the Element or Attr class. Note that this way
of creating nodes is not supported; creator functions like
xml.dom.Document.documentElement() should be used instead
(bsc#1254997, CVE-2025-12084).
- gh-137836: Add support of the “plaintext” element, RAWTEXT
elements “xmp”, “iframe”, “noembed” and “noframes”, and
optionally RAWTEXT element “noscript” in
html.parser.HTMLParser.
- gh-136063: email.message: ensure linear complexity for
legacy HTTP parameters parsing. Patch by Bénédikt Tran.
- gh-136065: Fix quadratic complexity in
os.path.expandvars() (bsc#1252974, CVE-2025-6075).
- gh-119451: Fix a potential memory denial of service in the
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 MemoryError, swapping, out of memory (OOM) killed
processes or containers, or even system crashes
(CVE-2025-13836, bsc#1254400).
- gh-119452: Fix a potential memory denial of service in the
http.server module. When a malicious user is connected to
the CGI server on Windows, it could cause an arbitrary
amount of memory to be allocated. This could have led to
symptoms including a MemoryError, swapping, out of memory
(OOM) killed processes or containers, or even system
crashes.
- gh-119342: Fix a potential memory denial of service in the
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 MemoryError, swapping, out of memory (OOM)
killed processes or containers, or even system crashes
(bsc#1254401, CVE-2025-13837).
- Library
- gh-144833: Fixed a use-after-free in ssl when SSL_new()
returns NULL in newPySSLSocket(). The error was reported
via a dangling pointer after the object had already been
freed.
- gh-144363: Update bundled libexpat to 2.7.4
- gh-90949: Add SetAllocTrackerActivationThreshold() and
SetAllocTrackerMaximumAmplification() to xmlparser objects
to prevent use of disproportional amounts of dynamic memory
from within an Expat parser. Patch by Bénédikt Tran.
- Core and Builtins
- gh-120384: Fix an array out of bounds crash in
list_ass_subscript, which could be invoked via some
specificly tailored input: including concurrent
modification of a list object, where one thread assigns
a slice and another clears it.
- gh-120298: Fix use-after free in list_richcompare_impl
which can be invoked via some specificly tailored evil
input.
Remove upstreamed patches:
- CVE-2025-11468-email-hdr-fold-comment.patch
- CVE-2025-12084-minidom-quad-search.patch
- CVE-2025-13836-http-resp-cont-len.patch
- CVE-2025-13837-plistlib-mailicious-length.patch
- CVE-2025-6075-expandvars-perf-degrad.patch
- CVE-2026-0672-http-hdr-inject-cookie-Morsel.patch
- CVE-2026-0865-wsgiref-ctrl-chars.patch
- CVE-2025-15282-urllib-ctrl-chars.patch
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