[3.14] gh-145986: Avoid unbound C recursion in conv_content_model in pyexpat.c (CVE 2026-4224) (GH-145987)#145995
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picnixz merged 1 commit intopython:3.14from Mar 15, 2026
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… `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) Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
picnixz
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Mar 15, 2026
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Fix C stack overflow (CVE-2026-4224) when an Expat parser
with a registered
ElementDeclHandlerparses inline DTDcontaining deeply nested content model.
(cherry picked from commit eb0e8be)
Co-authored-by: Stan Ulbrych 89152624+StanFromIreland@users.noreply.github.com
Co-authored-by: Bénédikt Tran 10796600+picnixz@users.noreply.github.com
pyexpat.c: Unbounded C recursion inconv_content_modelcauses crash (CVE 2026-4224) #145986