[3.10] gh-145986: Avoid unbound C recursion in conv_content_model in pyexpat.c (CVE 2026-4224) (GH-145987)#146002
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…del` in `pyexpat.c` (CVE 2026-4224) (pythonGH-145987) 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) Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
StanFromIreland
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Mar 15, 2026
Misc/NEWS.d/next/Security/2026-03-14-17-31-39.gh-issue-145986.ifSSr8.rst
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🤖 New build scheduled with the buildbot fleet by @StanFromIreland for commit d013b14 🤖 Results will be shown at: https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F146002%2Fmerge If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again. |
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Fix C stack overflow (CVE-2026-4224) when an Expat parser with a registered
ElementDeclHandlerparses inline DTD containing deeply nested content model.(cherry picked from commit eb0e8be) (cherry picked from commit e5caf45)
pyexpat.c: Unbounded C recursion inconv_content_modelcauses crash (CVE 2026-4224) #145986