{"id":"CVE-2026-122311","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-122311","summary":"Kyverno from 1.16.0 before 1.19.2 fails to validate path segments in the resource argument of resource.get() and resource.post(), allowing namespaced CEL policies to escape their namespace.…","details":"Kyverno from 1.16.0 before 1.19.2 fails to validate path segments in the resource argument of resource.get() and resource.post(), allowing namespaced CEL policies to escape their namespace. Tenants who can create a NamespacedValidatingPolicy can insert .. segments to read and write arbitrary cluster objects using the admission controller's ServiceAccount, leading to cluster takeover.","published":"2026-11-05T03:17:23.497","modified":"2026-11-05T03:17:23.497","cvss":{"score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-4pqm-wqq6-h9q2"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/kyverno-1.16.0-before-1.19.2-path-traversal-in-namespaced-cel-policies-via-resource-argument"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-05T03:17:23.497"}}