{"id":"CVE-2026-100707","title":"Kyverno before 1.19.1 contains a namespace isolation bypass in the apiCall context entry of namespaced Policy resources due to inconsistent path interpretation between validation and execution","summary":"Kyverno before 1.19.1 contains a namespace isolation bypass in the apiCall context entry of namespaced Policy resources due to inconsistent path interpretation between validation and execution. A low-privilege tenant can use percent-enco…","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","cwe":["CWE-22"],"vendor":"kyverno","product":"kyverno","affected":["kyverno < 1.19.1"],"published":"2026-09-26","updated":"2026-09-28","sourceUpdated":"2026-09-28T18:17:16.030","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100707","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-c5qq-7g2q-cpqp","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.1-namespace-isolation-bypass-via-percent-encoded-path","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-28T17:40:59.702394Z"},"ingestedAt":"2026-09-26T13:33:20.897Z","epss":0.0046,"epssPercentile":0.39739,"slug":"CVE-2026-100707","body":"## Overview\n\nKyverno before 1.19.1 contains a namespace isolation bypass in the apiCall context entry of namespaced Policy resources due to inconsistent path interpretation between validation and execution. A low-privilege tenant can use percent-encoded dot-segments in urlPath to bypass namespace checks and read resources from other namespaces using the Kyverno admission controller's ServiceAccount credentials.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":212080,"id":"CVE-2026-100707","ts":1790619521544,"field":"exploit_available","old":"false","new":"true"}]}