This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-56407 →

DEBIAN-CVE-2026-56407

libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.

Original description

The description as published by the source.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Debian:12 expat

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.0-1+deb12u3"}]}]

Debian:13 expat

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.2-1~deb13u1"}]}]

Debian:14 expat

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.2-1"}]}]