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CVE-2026-56412

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

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.

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 5.9 · libexpat_projectNVD modified 2026-10-25 23:10

Affected (CPE criteria) 1

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

References 1