CVE-2026-56131
4.9
MEDIUM
CVSS 3.1
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).
How to fix CVE-2026-56131
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/expat—no fix listed
Is CVE-2026-56131 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-56131.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| nvd | CVSS 3.1 | MEDIUM4.9 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |