{"id":"CVE-2026-74860","title":"A flaw was found in libxml2 with Python bindings enabled","summary":"A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This…","severity":"high","cvss":8.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-763"],"vendor":"Red Hat","product":"libxml2","affected":["libxml2 (all versions)","libxml2 (all versions)","libxml2 (all versions)","libxml2 (all versions)","libxml2 (all versions)","cert-manager/jetstack-cert-manager-rhel9 (all versions)","cert-manager/cert-manager-istio-csr-rhel9 (all versions)","cert-manager/cert-manager-operator-rhel9 (all versions)","libxml2-main (all versions)","podman","libxml2","libxml2 (all versions)","container-tools:rhel8/podman","podman","swift-lang","openshift/ose-rhel-coreos-8","openshift/ose-rhel-coreos-9","podman"],"patched":["hardened_images"],"published":"2026-09-08","updated":"2026-10-14","sourceUpdated":"2026-10-14T19:17:20.150","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74860","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:64463","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:71585","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:71586","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:71641","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:72470","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:72475","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:72476","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:79357","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82939","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74860","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2529697","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74860.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74860"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74860"},{"url":"https://access.redhat.com/errata/RHSA-2026:89750","label":"RHSA-2026:89750"},{"url":"https://access.redhat.com/errata/RHSA-2026:89759","label":"RHSA-2026:89759"},{"url":"https://access.redhat.com/errata/RHSA-2026:90309","label":"RHSA-2026:90309"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00658,"epssPercentile":0.5126,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-08T12:08:31.722346Z"},"ingestedAt":"2026-09-08T15:33:26.983Z","slug":"CVE-2026-74860","body":"## Overview\n\nA flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.\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** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74860.json)\n- **RHSA-2026:64463** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:64463)\n- **RHSA-2026:71586** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-09-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:71586)\n- **RHSA-2026:71641** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8) · released 2026-09-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:71641)\n- **RHSA-2026:71585** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9) · released 2026-09-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:71585)\n- **RHSA-2026:72475** · Red Hat · fixed in: Cert Manager support for Red Hat OpenShift release 1.20 · released 2026-09-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:72475)\n- **RHSA-2026:72476** · Red Hat · fixed in: Cert Manager support for Red Hat OpenShift release 1.20 · released 2026-09-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:72476)\n- **RHSA-2026:72470** · Red Hat · fixed in: Cert Manager support for Red Hat OpenShift release 1.20 · released 2026-09-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:72470)\n- **RHSA-2026:79357** · Red Hat · fixed in: Red Hat Cost Management On-Premise 1 · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:79357)\n- **RHSA-2026:89759** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-10-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:89759)\n- **RHSA-2026:89750** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux BaseOS E4S (v.9.4) · released 2026-10-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:89750)\n- **RHSA-2026:82939** · Red Hat · fixed in: Red Hat Update Infrastructure 5 · released 2026-10-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:82939)","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":46.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}