This page tracks the Alpine Linux fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-56412 →
ALPINE-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...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Alpine:v3.21
expat
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.2-r0"}]}]
Alpine:v3.22
expat
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.2-r0"}]}]
Alpine:v3.23
expat
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.2-r0"}]}]
Alpine:v3.24
expat
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.2-r0"}]}]
References
- advisory security.alpinelinux.org