VULNERABILITY INTELLIGENCE

CVE-2026-56131

CVSS score4.9 MEDIUM
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-06-19
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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).

Weakness classification

  • CWE-416: Use After Free

Primary references