CVE-2026-76957

Description

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.

References

https://github.com/libexpat/libexpat/pull/1329

https://github.com/libexpat/libexpat/pull/1322

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-63196

https://cert-portal.siemens.com/productcert/html/ssa-457936.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS