CVE-2026-76781 [MEDIUM] – A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML

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).