Python 3.12.15

Author: Yhg1s

Doc/library/asyncio-eventloop.rst

@@ -544,7 +544,7 @@ Opening network connections
    .. versionchanged:: 3.12
       *all_errors* was added.
 
-   .. versionchanged:: next
+   .. versionchanged:: 3.12.15
       Raises a ``DeprecationWarning`` if ``ssl.check_hostname`` is ``True``
       and ``server_hostname`` is not supplied. In Python 3.13 and
       later a ``ValueError`` is raised instead.

Doc/library/asyncio-stream.rst

@@ -382,7 +382,7 @@ StreamWriter
       .. versionchanged:: 3.12
          Added the *ssl_shutdown_timeout* parameter.
 
-      .. versionchanged:: next
+      .. versionchanged:: 3.12.15
          Raises a ``DeprecationWarning`` if ``ssl.check_hostname`` is ``True``
          and ``server_hostname`` is not supplied. In Python 3.13 and
          later a ``ValueError`` is raised instead.

Doc/library/ssl.rst

@@ -1695,7 +1695,7 @@ to speed up repeated connections from the same clients.
 
    .. versionadded:: 3.7
 
-   .. versionchanged:: next
+   .. versionchanged:: 3.12.15
       After the callback assigns a new :attr:`SSLSocket.context`, later
       ClientHello messages on the connection are dispatched to the new
       context's *sni_callback*.
@@ -1833,7 +1833,7 @@ to speed up repeated connections from the same clients.
       The method returns an instance of :attr:`SSLContext.sslobject_class`
       instead of hard-coded :class:`SSLObject`.
 
-   .. versionchanged:: next
+   .. versionchanged:: 3.12.15
       The *server_side*, *server_hostname* and *session* parameters are now
       validated as :meth:`SSLContext.wrap_socket` validates them. Previously
       a context with :attr:`~SSLContext.check_hostname` enabled and no

Doc/library/tarfile.rst

@@ -1047,7 +1047,7 @@ reused in custom filters:
 
   Return the modified ``TarInfo`` member.
 
-  .. versionchanged:: next
+  .. versionchanged:: 3.12.15
 
      Filenames containing ``..`` components are now normalized.
 

Doc/library/urllib.request.rst

@@ -956,7 +956,7 @@ These methods are available on :class:`HTTPPasswordMgr` and
    match authentication URIs with the same scheme or no scheme. A URI without a
    scheme matches authentication URIs with any scheme.
 
-   .. versionchanged:: next
+   .. versionchanged:: 3.12.15
       Authentication credentials for URIs with a scheme are now scoped by
       that scheme.
 

Include/patchlevel.h

@@ -18,12 +18,12 @@
 /*--start constants--*/
 #define PY_MAJOR_VERSION        3
 #define PY_MINOR_VERSION        12
-#define PY_MICRO_VERSION        14
+#define PY_MICRO_VERSION        15
 #define PY_RELEASE_LEVEL        PY_RELEASE_LEVEL_FINAL
 #define PY_RELEASE_SERIAL       0
 
 /* Version as a string */
-#define PY_VERSION              "3.12.14+"
+#define PY_VERSION              "3.12.15"
 /*--end constants--*/
 
 /* Version as a single 4-byte hex number, e.g. 0x010502B2 == 1.5.2b2.

Lib/pydoc_data/topics.py

@@ -1,4 +1,4 @@
-# Autogenerated by Sphinx on Wed Aug 12 15:57:50 2026
+# Autogenerated by Sphinx on Thu Oct  1 00:04:15 2026
 # as part of the release process.
 
 topics = {

Misc/NEWS.d/3.12.15.rst

@@ -0,0 +1,170 @@
+.. date: 2026-09-29-16-32-46
+.. gh-issue: 158446
+.. nonce: dToaPr
+.. release date: 2026-10-01
+.. section: Security
+
+Fix a crash or incorrect output that could occur when formatting a
+:class:`float` or :class:`complex` with a precision close to the platform's
+``INT_MAX``.  :c:func:`PyOS_double_to_string` now raises :exc:`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``.
+
+..
+
+.. date: 2026-09-23-11-34-30
+.. gh-issue: 156793
+.. nonce: zC_AjF
+.. section: Security
+
+:mod:`asyncio`: :meth:`loop.start_tls() <asyncio.loop.start_tls>` and
+:meth:`loop.create_connection() <asyncio.loop.create_connection>` now
+validate the *server_hostname* argument if an :class:`ssl.SSLContext` is
+passed with *check_hostname* set to ``True``, emitting
+:exc:`DeprecationWarning` if *server_hostname* is missing. (This will raise
+:exc:`ValueError` in Python 3.13 and later.)
+
+..
+
+.. date: 2026-09-16-14-05-19
+.. gh-issue: 156793
+.. nonce: Qa1T5Z
+.. section: Security
+
+:meth:`ssl.SSLContext.wrap_bio` now validates its *server_side*,
+*server_hostname* and *session* arguments similar to
+:meth:`ssl.SSLContext.wrap_socket`, but for backward compatiblity reasons
+emits :exc:`DeprecationWarning` instead of :exc:`ValueError`.
+
+In particular, a context with :attr:`~ssl.SSLContext.check_hostname` enabled
+and no *server_hostname* passed to :meth:`!wrap_bio` now emits
+:exc:`DeprecationWarning` to indicate the hostname wasn't checked. (In
+Python 3.13 and later, this raises :exc:`ValueError`.)
+
+..
+
+.. date: 2026-09-10-13-38-11
+.. gh-issue: 157265
+.. nonce: -vYuMp
+.. section: Security
+
+In :mod:`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.
+
+..
+
+.. date: 2026-09-06-11-02-46
+.. gh-issue: 157190
+.. nonce: tarhln
+.. section: Security
+
+Fixed a vulnerability in the :mod:`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`.
+
+..
+
+.. date: 2026-08-31-16-47-33
+.. gh-issue: 157953
+.. nonce: KxCF5N
+.. section: Security
+
+Update bundled `libexpat <https://libexpat.github.io/>`_ to version 2.8.5.
+
+..
+
+.. date: 2026-08-18-13-54-05
+.. gh-issue: 156002
+.. nonce: CcWXPP
+.. section: Security
+
+Bound the amount of data :mod:`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.
+
+..
+
+.. date: 2026-08-13-13-08-11
+.. gh-issue: 155999
+.. nonce: Xt4rWq
+.. section: Security
+
+Fix the :mod:`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.
+
+..
+
+.. date: 2026-08-10-12-00-00
+.. gh-issue: 156293
+.. nonce: sNIcbk
+.. section: Security
+
+Fix a crash in :mod:`ssl` when an :attr:`~ssl.SSLContext.sni_callback`
+switches a connection to another :class:`~ssl.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`.
+
+..
+
+.. date: 2026-08-06-11-43-20
+.. gh-issue: 155292
+.. nonce: j4pHBO
+.. section: Security
+
+Change the :mod:`stringprep` module and :mod:`encodings.idna` codec to not
+consider Unicode codepoint attributes beyond those defined in :rfc:`3454`.
+
+..
+
+.. date: 2026-07-31-16-20-17
+.. gh-issue: 155694
+.. nonce: SsxlKG
+.. section: Security
+
+Fix :cve:`2026-15806` by scoping :class:`~urllib.request.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.
+
+..
+
+.. date: 2026-09-08-13-06-29
+.. gh-issue: 156002
+.. nonce: vmOC8T
+.. section: Library
+
+:mod:`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`.
+
+..
+
+.. date: 2026-08-26-02-30-00
+.. gh-issue: 156353
+.. nonce: abcdef
+.. section: Library
+
+Fix :mod:`configparser` parsing when using whitespace in *delimiters*.
+
+..
+
+.. date: 2026-08-13-12-57-27
+.. gh-issue: 155757
+.. nonce: _5cg0h
+.. section: Build
+
+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.