CVE-2026-56412

Published June 21st, 2026

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CVSS v3

4.9

MEDIUM

CVSS v2

N/A

Affected

PROJECT

Description

libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.

libexpat/libexpat

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

GitHub

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