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Cpython v3.11.16

Cpython: v3.11.16 Release

Release date:
August 12, 2026
Previous version:
v3.11.15 (released March 3, 2026)
Magnitude:
827 Diff Delta
Contributors:
10 total committers
Data confidence:
Commits:
48 impacting commits

27 Features Released with v3.11.16

[3.11] gh-145098: Use `macos-15-intel` instead of unstable `macos-26-…intel` in `{jit,tail-call}.yml` (GH-148126)
#148138
[3.11] gh-146211: Reject CR/LF in HTTP tunnel request headers (GH-146…
#148351
gh-144370: Disallow usage of control characters in status in ``Lib/wsgiref/handlers.py`` for security
#144371
[3.11] Remove MSI build from security-only branch (GH-148007)
#148008
Add `permissions: {}` to all reusable workflows
#148114
[3.11] gh-148169: Fix webbrowser `%action` substitution bypass of dash-prefix check (GH-148170)
#148520
[3.11] Replace deprecated action with RtD app (GH-149111) (GH-150233)
#151657
[3.11] gh-148395: Fix a possible UAF in `{LZMA,BZ2}Decompressor` (GH-148396)
#148504
[3.11] gh-141707: Skip TarInfo DIRTYPE normalization during GNU long name handling
#145815
[3.11] Add `mkdir`s to fix 3.11 docs build
#145571
[3.11] gh-145455: Show output of blurb & sphinx-build version commands (GH-145457)
#145491
[3.11] gh-146083: Upgrade bundled Expat to 2.7.5 (GH-146085)
#146607
[3.11] gh-145098: Run Apple Silicon macOS CI on macos-26 (Tahoe) (GH-145099) (GH-146412) (GH-146414) (GH-146635)
#146638
[3.11] gh-146488: hash-pin all action references (gh-146489)
#147979
[3.11] gh-137586: Open external osascript program with absolute path (GH-137584)
#148176
[3.11] gh-94632: document the subprocess need for extra_groups=() with user= (GH-148129)
#148133
[3.11] gh-143930: Reject leading dashes in webbrowser URLs (GH-143931)
#146364
[3.11] Default GHA permissions to `contents: read` (GH-148346)
#148389
[3.11] gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoader uses io.open_code (GH-145507)
#145515
[3.11] Replace `pre-commit/action` with `j178/prek-action`
#150237
[3.11] gh-149486: tarfile.data_filter: validate written link target (GH-149487)
#150904
[3.11] CI: Move Homebrew dependencies into Brewfile (GH-148335) (GH-149884)
#149989
[3.11] gh-151558: Fix symlink escape via `tarfile` hardlink-extraction fallback (GH-151559)
#152001
[3.11] gh-150743: Limit trailer lines and interim responses read by http.client (GH-150749)
#152528
[3.11] gh-87451: Apply CVE-2021-4189 PASV fix to ftplib.ftpcp() (GH-149648)
#149796
[3.11] gh-151981: Make tarfile._Stream.seek break at EOF (GH-151982)
#151995
[3.11] gh-151987: Pass filter_function to TarFile._extract_one() during .extract() (GH-151988)
#152612

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Top Contributors in v3.11.16

StanFromIreland
serhiy-storchaka
miss-islington
sethmlarson
jihugo
pablogsal
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