CVE-2026-56131

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).

PUBLISHED Reserved 2026-06-19 | Published 2026-06-19 | Updated 2026-06-19 | Assigner mitre

Problem types

CWE-416 Use After Free

Product status

References

github.com/libexpat/libexpat/pull/1267

cve.org (CVE-2026-56131)

nvd.nist.gov (CVE-2026-56131)

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