{"id":"CVE-2026-100706","title":"kyverno before 1.19.1 fails to properly validate URL-encoded path segments in Policy apiCall urlPath, allowing namespace tenants to bypass the per-namespace clamp and create objects in other namespaces as the admission-controller Service…","summary":"kyverno before 1.19.1 fails to properly validate URL-encoded path segments in Policy apiCall urlPath, allowing namespace tenants to bypass the per-namespace clamp and create objects in other namespaces as the admission-controller Service…","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","cwe":["CWE-441"],"vendor":"kyverno","product":"kyverno","affected":["kyverno < 1.19.1"],"published":"2026-09-26","updated":"2026-09-26","sourceUpdated":"2026-09-26T23:16:32.810","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100706","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-5qq8-67g6-4h2w","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.1-privilege-escalation-via-policy-apicall-urlpath","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-26T23:08:47.920272Z"},"ingestedAt":"2026-09-26T13:33:20.898Z","slug":"CVE-2026-100706","body":"## Overview\n\nkyverno before 1.19.1 fails to properly validate URL-encoded path segments in Policy apiCall urlPath, allowing namespace tenants to bypass the per-namespace clamp and create objects in other namespaces as the admission-controller ServiceAccount. Attackers can exploit this by using percent-encoded directory traversal sequences to create MutatingWebhookConfiguration objects cluster-wide or PolicyException objects in the kyverno namespace, enabling privilege escalation to cluster admin.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":54.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}