{"id":"CVE-2026-122311","title":"Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argument","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. Tenants who can create a NamespacedValidatingPo…","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-22"],"vendor":"kyverno","product":"kyverno","affected":["kyverno >= 1.16.0 < 1.19.2"],"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T02:25:13.645Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-122311","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-4pqm-wqq6-h9q2","label":"GitHub Security Advisory (GHSA-4pqm-wqq6-h9q2)"},{"url":"https://www.vulncheck.com/advisories/kyverno-1.16.0-before-1.19.2-path-traversal-in-namespaced-cel-policies-via-resource-argument","label":"VulnCheck Advisory: Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argument"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.685Z","epss":0.00448,"epssPercentile":0.39158,"slug":"CVE-2026-122311","body":"## Overview\n\nKyverno 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.\n\n## Affected\n\n- `kyverno >= 1.16.0 < 1.19.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":54.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}