{"id":"CVE-2026-122312","title":"Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String","summary":"Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?' as a path character, letting the namespace regex match segments inside the query st…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-269"],"vendor":"kyverno","product":"kyverno","affected":["kyverno >= 1.19.1 < 1.19.2"],"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T02:25:14.338Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-122312","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-pcx2-xcq4-65vf","label":"GitHub Security Advisory (GHSA-pcx2-xcq4-65vf)"},{"url":"https://github.com/kyverno/kyverno/commit/f67231def576eb0ad153dd8cbfc836908ab14c14","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/kyverno-1.19.1-before-1.19.2-namespace-isolation-bypass-via-apicall-urlpath-query-string","label":"VulnCheck Advisory: Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.687Z","epss":0.00311,"epssPercentile":0.24099,"slug":"CVE-2026-122312","body":"## Overview\n\nKyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?' as a path character, letting the namespace regex match segments inside the query string. Users who can create namespaced policies can supply a URLPath like /api/v1/nodes?x=/namespaces/default/ that passes validation while client-go requests the cluster-scoped endpoint, reading resources outside their namespace.\n\n## Affected\n\n- `kyverno >= 1.19.1 < 1.19.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}