CVE Catalog
CVE-2026-56131
MediumCVSS 4.9Exploitation Probability (EPSS)
Low risk0.10%
1th percentile — higher than 1% of all known CVEs
Summary
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. This can lead to a use-after-free situation.
Risk Assessment
Organizations may be exposed to attacks exploiting this vulnerability, potentially leading to unauthorized memory access and application crashes.
Recommendation
It is recommended to update the libexpat library to version 2.8.2 or later to mitigate this vulnerability.
Original NVD description (English source)
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).