CVE-2026-56412MediumCVSS 4.9

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.

Published
June 30, 2026
Last Modified
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🔗 CVE IDs covered (1)

CVE-2026-56412 →

🎯 Affected products3

  • azl3 cmake 3.30.3-13 on Azure Linux 3.0
  • azl3 expat 2.6.4-6 on Azure Linux 3.0
  • azl3 python3 3.12.9-11 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 2.8.2-1

🔗 References (2)