{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63121", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-15T16:54:55.816Z", "datePublished": "2026-10-30T22:08:03.004Z", "dateUpdated": "2026-11-05T02:56:16.633Z"}, "containers": {"cna": {"title": "Kubewarden trusted-repos-policy: uppercase registry host bypasses registry/image deny rules", "problemTypes": [{"descriptions": [{"cweId": "CWE-178", "lang": "en", "description": "CWE-178: Improper Handling of Case Sensitivity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/kubewarden/policies/security/advisories/GHSA-8p62-9vh2-272p", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/kubewarden/policies/security/advisories/GHSA-8p62-9vh2-272p"}, {"name": "https://github.com/kubewarden/policies/commit/bc5597fcbbb0bc464b714ca7ff645c9743dea41b", "tags": ["x_refsource_MISC"], "url": "https://github.com/kubewarden/policies/commit/bc5597fcbbb0bc464b714ca7ff645c9743dea41b"}, {"name": "https://github.com/kubewarden/policies/tree/trusted-repos-policy/v2.1.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/kubewarden/policies/tree/trusted-repos-policy/v2.1.2"}], "affected": [{"vendor": "kubewarden", "product": "policies", "versions": [{"version": "< 2.1.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-30T22:08:03.004Z"}, "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."}], "source": {"advisory": "GHSA-8p62-9vh2-272p", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-05T02:56:06.807176Z", "id": "CVE-2026-63121", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T02:56:16.633Z"}}]}}

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{}