{"id":"CVE-2026-122304","title":"Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader","summary":"Kyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace admins to escape namespace confinement because the cleanup controller builds its context loader with a nil policy. Attackers can creat…","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-863"],"vendor":"kyverno","product":"kyverno","affected":["kyverno >= 1.17.0 < 1.19.2"],"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T02:25:08.931Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-122304","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-p58h-r4j3-h5vx","label":"GitHub Security Advisory (GHSA-p58h-r4j3-h5vx)"},{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-rcxg-3f92-3mgr","label":"GitHub Security Advisory (GHSA-rcxg-3f92-3mgr)"},{"url":"https://www.vulncheck.com/advisories/kyverno-1.17.0-before-1.19.2-privilege-escalation-via-cleanuppolicy-context-loader","label":"VulnCheck Advisory: Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.684Z","epss":0.00392,"epssPercentile":0.33581,"slug":"CVE-2026-122304","body":"## Overview\n\nKyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace admins to escape namespace confinement because the cleanup controller builds its context loader with a nil policy. Attackers can create a namespaced CleanupPolicy with apiCall or globalReference context entries to read cross-namespace Secrets and modify validatingwebhookconfigurations using the cleanup controller's ServiceAccount.\n\n## Affected\n\n- `kyverno >= 1.17.0 < 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":[]}