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Cpython v3.13.10

Cpython: v3.13.10 Release

Release date:
December 2, 2025
Previous version:
v3.13.9 (released October 14, 2025)
Magnitude:
1,510 Diff Delta
Contributors:
17 total committers
Data confidence:
Commits:
42 impacting commits

200 Features Released with v3.13.10

[3.13] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234)
#139367
[3.13] GH-139596: Cease caching config.cache & ccache in GH Actions (GH-141429)
#141569
[3.13] gh-140551: Fix dict crash if clear is called at lookup stage (GH-140558)
#140744
[3.13] gh-141930: Use the regular IO stack to write .pyc files for a better error message on failure (GH-141931)
#142023
[3.13] gh-141311: Avoid assertion in BytesIO.readinto() (GH-141333)
#141478
[3.13] gh-139590: Stricter `ruff` rules for `Tools/wasm` (GH-139752)
#140986
[3.13] gh-70765: avoid waiting for HTTP headers when parsing HTTP/0.9 requests (GH-139514)
#139602
[3.13] gh-139434: Update selected RFC 2822 references to RFC 5322 (GH-139435)
#141024
[3.13] gh-100218: correctly set `errno` when `socket.if_{nametoindex,indextoname}` raise `OSError` (GH-140905)
#141285
[3.13] gh-135307: Fix email error when policy max_line_length is set to 0 or None (GH-135367)
#140917
[3.13] gh-140000: Traverse `name` attribute for `TypeVar`, `TypeVarTuple`, `TypeAliasType`, `ParamSpec` (GH-140016)
#140073
[3.13] gh-140406: Fix memory leak upon `__hash__` returning a non-integer (GH-140411)
#140441
[3.13] gh-139516: Fix lambda colon start format spec in f-string in t…
#139726
[3.13] GH-141312: Allow only integers to longrangeiter_setstate state (GH-141317)
#141568
[3.13] gh-140939: Fix memory leak in `_PyBytes_FormatEx` error path (GH-140957)
#141155
[3.13] GH-129805: Clean up some changes from GH-129806 (GH-133540)
#141165
[3.13] gh-140607: Validate returned byte count in RawIOBase.read (GH-140611)
#140730
[3.13] gh-140593: Fix a memory leak in function `my_ElementDeclHandler` of `pyexpat` (GH-140602)
#140630
[3.13] GH-101100: Remove some entries from ``nitpick_ignore`` (GH-138464)
#141827
[3.13] gh-137568: Ignore startup file in `test_dumb_terminal_exits_cleanly` (GH-140295)
#140632
[3.13] gh-137638: Use macos-15-intel in GitHub Actions (GH-139154)
#139790
[3.13] GH-139590: Run `ruff format` on pre-commit for Tools/wasm (GH-139591)
#139745
[3.13] gh-139436: Remove ``dist-pdf`` from the docs archives rebuild target (GH-139437)
#139693
[3.13] gh-136234: Fix `SelectorSocketTransport.writelines` to be robust to connection loss (GH-136743) (GH-138702)
#139710
[3.13] gh-139308: Skip test_special_chars_csh on NetBSD due to csh variable expansion issue (GH-139341)
#139560
[3.13] gh-83424: Allow empty name if handle is non-null when create ctypes.CDLL on Windows (GH-136878)
#138547
[3.13] gh-101100: Document zlib public constants to fix reference warnings (GH-139835)
#139912
[3.13] gh-139905: Provide suggestion in error message if `Generic.__init_subclass__` was not called (GH-139943)
#139956
[3.13] gh-96491: Deduplicate version in IDLE shell title (GH-139841)
#139932
[3.13] gh-139843: Document `signal.SIGQUIT` to fix Sphinx references (GH-139844)
#139886

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Top Contributors in v3.13.10

hartwork
jihugo
StanFromIreland
efimov-mikhail
cmaloney
picnixz
zangjiucheng
tom-pytel
sergey-miryanov
ZeroIntensity

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