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CVE-2026-56131

4.9 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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).

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 4.9 · libexpat_projectNVD modified 2026-10-26 11:10

Affected (CPE criteria) 1

  • cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*

References 1