{"id":"CVE-2026-100704","aliases":["GHSA-5cjf-wwfg-pj4c"],"url":"https://o3.security/vulnerability/CVE-2026-100704","summary":"Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass","details":"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 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.","published":"2026-09-26T13:23:59.326Z","modified":"2026-09-27T03:47:26.731201758Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100704.json"},{"type":"ADVISORY","url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100704"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.1-imagevalidatingpolicy-exception-bypass"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-27T03:47:26.731201758Z"}}