CVE-2026-76957: 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.
Overview
- Severity
- Medium (CVSS 4.9)
- CVSS Vector
- CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Aug
- Released
- 2026-08-21
- Last Updated
- 2026-08-23
- EPSS Score
- 0.10% (percentile: 1.1%)
Affected Products (1)
Other
Revision History
- 2026-08-21: Information published.
- 2026-08-23: Information published.