{"affected":[{"affectedData":[{"product":"policies","vendor":"kubewarden","versions":[{"status":"affected","version":"< 2.1.2"}]}],"source":"security-advisories@github.com"}],"cveTags":[],"descriptions":[{"lang":"en","value":"Kubewarden policies is a collection of WebAssembly policies for securing and governing Kubernetes clusters. For versions provisionally classified as affected before 2.1.2, `trusted-repos-policy` compares an image's `registry` hostname against `reject lists` and `allow lists` case-sensitively even though `registry` DNS names are case-insensitive. An image with an uppercase or mixed-case `registry` hostname can miss a rejection rule for the equivalent lowercase host, so the admission policy accepts a resource whose container runtime pulls the same prohibited image. Only reject-list configurations have this bypass: allow-list configurations fail closed by over-denying differently cased hostnames. The security consequences depend on the configured rejection policy and deployment environment. This issue is fixed in version 2.1.2."}],"id":"CVE-2026-63121","lastModified":"2026-11-05T03:17:30.417","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","version":"3.1"},"exploitabilityScore":2.8,"impactScore":3.4,"source":"security-advisories@github.com","type":"Secondary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-63121","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-11-05T02:56:06.807176Z","version":"2.0.3"}}]},"published":"2026-10-30T22:16:58.123","references":[{"source":"security-advisories@github.com","url":"https://github.com/kubewarden/policies/commit/bc5597fcbbb0bc464b714ca7ff645c9743dea41b"},{"source":"security-advisories@github.com","url":"https://github.com/kubewarden/policies/security/advisories/GHSA-8p62-9vh2-272p"},{"source":"security-advisories@github.com","url":"https://github.com/kubewarden/policies/tree/trusted-repos-policy/v2.1.2"}],"sourceIdentifier":"security-advisories@github.com","vulnStatus":"Awaiting Analysis","weaknesses":[{"description":[{"lang":"en","value":"CWE-178"}],"source":"security-advisories@github.com","type":"Secondary"}]}