CVE-2026-56412
5.9
MEDIUM
CVSS 3.1
EPSS 0.10%
Description
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.
How to fix CVE-2026-56412
To remediate CVE-2026-56412, upgrade the affected package to a fixed version below.
- Alpine/expat—upgrade to 2.8.2-r0 or later
- —no fix listed
Is CVE-2026-56412 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.8.2-r0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |