{"id":"CVE-2026-100704","title":"Kyverno is a policy engine for Kubernetes","summary":"Kyverno is a policy engine for Kubernetes. In versions 1.14.0 through 1.19.0, the ImageValidatingPolicy (policies.kyverno.io/v1beta1) evaluator never reads the spec.images and spec.allowedValues fields of a PolicyException. Any PolicyExc…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","cwe":["CWE-863"],"vendor":"kyverno","product":"kyverno","affected":["kyverno >= 1.14.0 < 1.19.1"],"published":"2026-09-26","updated":"2026-09-30","sourceUpdated":"2026-09-30T17:23:08.953","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100704","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.1-imagevalidatingpolicy-exception-bypass","label":"disclosure@vulncheck.com"},{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00219,"epssPercentile":0.12319,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-28T14:50:12.818189Z"},"ingestedAt":"2026-09-26T13:33:20.899Z","slug":"CVE-2026-100704","body":"## Overview\n\nKyverno is a policy engine for Kubernetes. In versions 1.14.0 through 1.19.0, the ImageValidatingPolicy (policies.kyverno.io/v1beta1) evaluator never reads the spec.images and spec.allowedValues fields of a PolicyException. Any PolicyException whose policyRefs and matchConditions match a resource causes image signature verification to be skipped for the entire resource rather than only for the listed images or values, so an exception intended to exempt a single trusted image exempts every image on the matched resource(s). As a result, unsigned or untrusted images can be admitted to the cluster without signature verification. This differs from ValidatingPolicy, GeneratingPolicy, and MutatingPolicy, which treat the same field as a partial exemption. The issue is fixed in version 1.19.1.\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,"exploitation":12,"ransomware":0},"changes":[{"seq":211975,"id":"CVE-2026-100704","ts":1790608489020,"field":"exploit_available","old":"false","new":"true"}]}