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Cpython v3.14.5rc1

Cpython: v3.14.5rc1 Release

Release date:
May 18, 2026
Previous version:
v3.14.4 (released April 7, 2026)
Magnitude:
4,166 Diff Delta
Contributors:
14 total committers
Data confidence:
Commits:
125 impacting commits

119 Features Released with v3.14.5rc1

[3.14] gh-146211: Reject CR/LF in HTTP tunnel request headers (GH-146212)
#148342
[3.14] gh-148947: dataclasses: fix error on empty __class__ cell (GH-148948)
#148995
[3.14] gh-148801: Fix unbound C recursion in `Element.__deepcopy__()` (GH-148802)
#148842
[3.14] gh-149254: Bump OpenSSL versions for iOS and Android.
#149272
[3.14] gh-137335: remove a mktemp use in multiprocessing.connection to avoid security scanner noise (GH-148578)
#148583
[3.14] gh-149017: Upgrade bundled Expat to 2.8.0 (GH-149020)
#149073
GH-146475: Block Apple Clang for building JIT stencils
#149188
[3.12] gh-149017: Upgrade bundled Expat to 2.8.0 (GH-149020) (GH-149073)
#150007
[3.14] gh-149122: Fix refleak in codegen (GH-149179)
#149181
[3.14] gh-140287: Handle `PYTHONSTARTUP` script exceptions in the asyncio REPL (GH-140288)
#148987
[3.14] gh-148169: Fix webbrowser `%action` substitution bypass of dash-prefix check (GH-148170)
#148516
[3.14] gh-121946: Use clang-20 for TSan build (GH-148570)
#148755
[3.14] gh-148808: Add boundary check to asyncio.AbstractEventLoop.sock_recvf… (GH-148809)
#148837
[3.14] gh-70039: smtplib: store the server name in ._host in .connect() (GH-115259)
#148273
[3.14] gh-132631: Fix "I/O operation on closed file" when parsing JSON Lines file (GH-132632)
#148921
[3.14] gh-149148: Upgrade bundled pip to 26.1 (GH-149150)
#149154
[3.14] gh-148222: Fix NULL dereference bugs in genericaliasobject.c (GH-148226)
#148705
[3.14] Un-skip previously-broken `test_get_type_hints_modules_forward_ref`
#149053
[3.14] gh-149122: Fix segfault in compiler when certain builtin functions are passed a coroutine as arg (GH-149138)
#149151
[3.14]gh-149221:Fix binomialvariate Function for random module
#149276
[3.14] gh-148395: Fix a possible UAF in `{LZMA,BZ2,_Zlib}Decompressor` (GH-148396)
#148480
[3.14] gh-146553: Fix infinite loop in typing.get_type_hints() on circular __wrapped__ (GH-148595)
#148895
[3.14] gh-148093: Raise binascii.Error from binascii.a2b_uu() on empty input (GH-149077)
#149350
[3.14] gh-146264: Use static HACL deps for static module builds (GH-146265)
#148403
[3.14] gh-146139: Disable `socketpair` authentication on WASI (GH-146140)
#148526
[3.14] gh-145831: email.quoprimime: `decode()` leaves stray `\r` when `eol='\r\n'` (GH-145832)
#148312
[3.14] gh-149221: Sync random.py with main branch
#149288
[3.14] tests: use errno.EBADF instead of hardcoded number in _close_file() (GH-148345)
#148410
[3.14] gh-148208: Fix recursion depth leak in `PyObject_Print` (GH-148209)
#148412
[3.14] gh-146578: _zstd: Fix printf format for pledged size errors (GH-146576)
#148855

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Top Contributors in v3.14.5rc1

miss-islington
sergey-miryanov
kumaraditya303
StanFromIreland
jihugo
colesbury
JelleZijlstra
freakboy3742
savannahostrowski
lighting9999

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