{"id":"CVE-2026-76781","title":"A flaw was found in libxml2","summary":"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` …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"Red Hat","product":"libxml2-main","affected":["libxml2-main (all versions)","libxml2","podman (all versions)","libxml2","libxml2","container-tools:rhel8/podman (all versions)","libxml2 (all versions)","podman (all versions)","libxml2","podman (all versions)","swift-lang","openshift/ose-rhel-coreos-8 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","podman (all versions)"],"patched":["hardened_images"],"published":"2026-09-17","updated":"2026-09-24","sourceUpdated":"2026-09-24T12:17:12.793","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76781","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:57604","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-76781","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2519776","label":"secalert@redhat.com"},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894","label":"secalert@redhat.com"},{"url":"https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-76781.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-76781"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76781"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T17:10:17.266721Z"},"epss":0.0016,"epssPercentile":0.05583,"ingestedAt":"2026-09-17T16:21:47.710Z","slug":"CVE-2026-76781","body":"## Overview\n\nA 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).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-76781.json)\n- **RHSA-2026:57604** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:57604)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}