CVE-2026-76781

Description

A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).

CVSS Vector

References

• https://access.redhat.com/security/cve/CVE-2026-76781
• https://bugzilla.redhat.com/show_bug.cgi?id=2519776
• https://gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894
• https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442