CVE-2026-56412: libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.
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-Jun
- Released
- 2026-06-27
- Last Updated
- 2026-07-03
- EPSS Score
- 0.18% (percentile: 6.7%)
Affected Products (3)
Other
- 21279-17084
- 21119-17084
- 21379-17084
Revision History
- 2026-06-27: Information published.
- 2026-06-28: Information published.
- 2026-06-29: Information published.
- 2026-07-03: Information published.