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Title: [3.11] gh-145986: Avoid unbound C recursion in `conv_content_model` in `pyexpat.c` (CVE 2026-4224) (GH-145987) by StanFromIreland · Pull Request #146000 · python/cpython · GitHub

Open Graph Title: [3.11] gh-145986: Avoid unbound C recursion in `conv_content_model` in `pyexpat.c` (CVE 2026-4224) (GH-145987) by StanFromIreland · Pull Request #146000 · python/cpython

X Title: [3.11] gh-145986: Avoid unbound C recursion in `conv_content_model` in `pyexpat.c` (CVE 2026-4224) (GH-145987) by StanFromIreland · Pull Request #146000 · python/cpython

Description: Fix C stack overflow (CVE-2026-4224) when an Expat parser with a registered ElementDeclHandler parses inline DTD containing deeply nested content model. (cherry picked from commit eb0e8be) (cherry picked from commit e5caf45) Issue: gh-145986

Open Graph Description: Fix C stack overflow (CVE-2026-4224) when an Expat parser with a registered ElementDeclHandler parses inline DTD containing deeply nested content model. (cherry picked from commit eb0e8be) (cherry...

X Description: Fix C stack overflow (CVE-2026-4224) when an Expat parser with a registered ElementDeclHandler parses inline DTD containing deeply nested content model. (cherry picked from commit eb0e8be) (cherry...

Opengraph URL: https://github.com/python/cpython/pull/146000

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[3.11] gh-145986: Avoid unbound C recursion in conv_content_model in pyexpat.c (CVE 2026-4224) (GH-145987) https://github.com/python/cpython/pull/146000/files#top
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4197762 [3.11] gh-145986: Avoid unbound C recursion in `conv_content_model` i… StanFromIreland Mar 15, 2026 https://github.com/python/cpython/pull/146000/commits/4197762fbfb64bca345d9632709678ad7ebf9698
a2f929f Update Misc/NEWS.d/next/Security/2026-03-14-17-31-39.gh-issue-145986.… StanFromIreland Mar 15, 2026 https://github.com/python/cpython/pull/146000/commits/a2f929ff5da4511659e41aed47d909f711348979
f3b960f Merge branch '3.11' into backport-e5caf45-3.11 StanFromIreland Apr 8, 2026 https://github.com/python/cpython/pull/146000/commits/f3b960fb909854ece59a3df4d0d17d1109f13d6e
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