CVE-2026-56131

Published June 19th, 2026

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CVSS v3

4.9

MEDIUM

CVSS v2

N/A

Affected

PROJECT

Description

libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).

libexpat/libexpat

:herb: Fast streaming XML parser written in C99 with >90% test coverage; moved from SourceForge to GitHub

GitHub

1.34K