SUSE-SU-2026:24325-1

This update for python311 fixes the following issues:

• CVE-2026-15310: memory exhaustion in zipfile in bzip2/LZMA/Zstandard decompression (bsc#1277111).
• CVE-2026-15806: urllib.request.HTTPPasswordMgr credentials for one URL scheme sent over another scheme (bsc#1276223).
• CVE-2026-17084: StringPrep algorithm considered Unicode codepoint attributes outside Unicode 3.2.0 (bsc#1276226).
• CVE-2026-19445: reassigned SNI callbacks with unreferenced SSLContext instances can cause use-after-free (bsc#1283969).
• CVE-2026-19553: omitted server_hostname arguments in wrap_bio() can cause silent hostname verification bypasses (bsc#1283826).
• CVE-2026-19672: tarfile extraction filter bypass allows creation of directories outside the destination (bsc#1276227).
• CVE-2026-82049: tarfile extraction filters mishandle archives containing a hard link to a symbolic link, allowing file modification and content disclosure (bsc#1280459).

Changes for python311:

• Update to 3.11.17:
• Security
• gh-158446: Fix a crash or incorrect output that could occur when formatting a float or complex with a precision close to the platform's INT_MAX. PyOS_double_to_string() now raises ValueError for any precision of that magnitude, regardless of presentation type or value, as the format string parsers already did for precisions above INT_MAX.
• gh-157190: Fixed a vulnerability in the tarfile data and tar extraction filters where a crafted archive using a hard link to a symbolic link could change the permissions and modification time of a file outside the destination directory, and expose its contents inside the extracted tree. This addresses CVE 2026-82049. (bsc#1280459, CVE-2026-82049)
• gh-156793: asyncio: loop.start_tls() and loop.create_connection() now validate the server_hostname argument if an ssl.SSLContext is passed with check_hostname set to True, emitting DeprecationWarning if server_hostname is missing. (This will raise ValueError in Python 3.13 and later.) (bsc#1283826, CVE-2026-19553)
• gh-156793: ssl.SSLContext.wrap_bio() now validates its server_side, server_hostname and session arguments similar to ssl.SSLContext.wrap_socket(), but for backward compatiblity reasons emits DeprecationWarning instead of ValueError. In particular, a context with check_hostname enabled and no server_hostname passed to wrap_bio() now emits DeprecationWarning to indicate the hostname wasn't checked. (In Python 3.13 and later, this raises ValueError.)
• gh-157265: In tarfile, when extracting a link falls back to extracting a member of the archive, skip the member when the filter function returns None when called with the extracted member's name replaced with the link's.
• gh-157953: Update bundled libexpat to version 2.8.5.
• gh-156002: Bound the amount of data zipfile decompresses per read for members compressed with bzip2, LZMA, or Zstandard, matching the existing limit for deflate. A small archive member could previously expand into an unbounded allocation even when read in small chunks. (bsc#1277111, CVE-2026-15310)
• gh-155999: Fix the tarfile tar and data extraction filters creating directories outside the destination for members whose name leaves the destination and returns to it, such as ../evil/../dest/sub/file. The containment check used the resolved path, but intermediate directories were created from the name as given. (bsc#1276227, CVE-2026-19672)
• gh-156293: Fix a crash in ssl when an sni_callback switches a connection to another SSLContext and the context that carries the callback is no longer referenced by the application. Servers that keep their sni_callback context alive (the usual case when it wraps the listening socket or is stored on the server object) were not affected. This addresses CVE-2026-19445. (bsc#1283969, CVE-2026-19445)
• gh-155292: Change the stringprep module and encodings.idna codec to not consider Unicode codepoint attributes beyond those defined in RFC 3454. (bsc#1276226, CVE-2026-17084)
• gh-155694: Fix CVE-2026-15806 by scoping HTTPPasswordMgr credentials to the URL scheme, preventing credentials stored for an HTTPS URL from being used for a matching HTTP URL, while URIs without a scheme continue to match any scheme. (bsc#1276223, CVE-2026-15806)
• Library
• gh-156002: zipfile again reads members through a third-party decompressor installed by monkey-patching the private _get_decompressor() to return an object that only implements old BZ2Decompressor API from Python 3.3. Note that decompressors without needs_input and two-argument decompress() are vulnerable to CVE 2026-15310.
• gh-156353: Fix configparser parsing when using whitespace in delimiters.
• Build
• gh-155757: Set the --argv0 argument to wasmtime for WASI builds so the test suite passes. Otherwise the calculated paths to the stdlib for frozen modules is incorrect.