{"id":"CVE-2026-63121","published":"2026-10-30T22:16:58.123","lastModified":"2026-10-30T22:16:58.123","description":"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.","cvssScore":6.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","cwes":["CWE-178"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kubewarden/policies/commit/bc5597fcbbb0bc464b714ca7ff645c9743dea41b","tags":[]},{"url":"https://github.com/kubewarden/policies/security/advisories/GHSA-8p62-9vh2-272p","tags":[]},{"url":"https://github.com/kubewarden/policies/tree/trusted-repos-policy/v2.1.2","tags":[]}],"exploitRefs":[{"url":"https://github.com/kubewarden/policies/commit/bc5597fcbbb0bc464b714ca7ff645c9743dea41b","tags":[]},{"url":"https://github.com/kubewarden/policies/security/advisories/GHSA-8p62-9vh2-272p","tags":[]},{"url":"https://github.com/kubewarden/policies/tree/trusted-repos-policy/v2.1.2","tags":[]}],"hasPoc":true,"ai":null}