{"id":"CVE-2026-76781","summary":"Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute","details":"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).","modified":"2026-09-19T03:47:21.748488017Z","published":"2026-09-17T15:11:29.256Z","database_specific":{"cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76781.json","cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-76781"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76781.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76781"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2519776"},{"type":"FIX","url":"https://gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894"},{"type":"FIX","url":"https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.gnome.org/gnome/libxml2","events":[{"introduced":"0"},{"fixed":"c6324894"}],"database_specific":{"source":"REFERENCES"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76781.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}