{"id":"CVE-2026-56131","published":"2026-06-19T02:56:36Z","modified":"2026-06-22T14:58:17Z","title":"libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of…","vendor":"libexpat project","product":"libexpat","tier":"tail","description":{"text":"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).","provenance":"source","from":"CVE.org"},"cvss":{"score":4.9,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00175,"percentile":0.06992,"provenance":"source"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://github.com/libexpat/libexpat/pull/1267","tags":[]}],"priority":{"score":4.8,"factors":[{"name":"EPSS percentile","points":1.4},{"name":"CVSS severity","points":3.43}]},"vendorSlug":"libexpat-project","affectedVersions":[{"vendor":"libexpat project","product":"libexpat","versions":["< 2.8.2"]}],"euvd":{"id":"EUVD-2026-37976","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-libexpat-cve-2026-50219","parents":[{"from":"CVE-2026-50219","to":"CVE-2026-56131","relation":"related","confidence":"medium","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"related","quote":"Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).","from":"CVE.org","in":"CVE-2026-56131"},{"kind":"similar","provenance":"machine","score":0.47,"basis":"same product + CWE + description similarity"}]}],"children":[{"from":"CVE-2026-56131","to":"CVE-2026-76957","relation":"related","confidence":"medium","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"related","quote":"NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.","from":"CVE.org","in":"CVE-2026-76957"},{"kind":"similar","provenance":"machine","score":0.53,"basis":"same product + CWE + description similarity"}]}]}}