CVE-2026-56131

Published Jun 19, 2026

Last updated 4 months ago

Overview

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).
Source
cve@mitre.org
NVD status
Analyzed
Products
libexpat

Risk scores

CVSS 3.1

Type
Secondary
Base score
4.9
Impact score
3.4
Exploitability score
1.4
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Severity
MEDIUM

Weaknesses

cve@mitre.org
CWE-416

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.