{"id":"EUVD-2026-30489","revision":"fb41c7828c1f49e9be8fb7019baedb1a","records":[{"revision":"fb41c7828c1f49e9be8fb7019baedb1a","observedAt":"2026-10-28T06:13:04.538+00:00","statement":{"source":"euvd","id":"EUVD-2026-30489","aliases":["CVE-2026-45781","GHSA-2v5f-5r6w-p67r"],"title":"The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.9, OCI ownership validation skips label-match check when upstream OCI registry returns HTTP 429, letting any authenticated pub…","description":"The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.9, OCI ownership validation skips label-match check when upstream OCI registry returns HTTP 429, letting any authenticated publisher bind their io.github.<user>/* namespace to OCI images they do not control. internal/validators/registries/oci.go:104-119 fails open on http.StatusTooManyRequests: when the registry's anonymous fetch to the upstream OCI registry is rate-limited, ValidateOCI returns nil and the publish is accepted without ever running the io.modelcontextprotocol.server.name label-match check at lines 122-141. That label check is the only cross-system ownership proof the registry applies to OCI packages — every other registry type (NPM, PyPI, NuGet, MCPB) treats a non-200 upstream response as a hard error. This vulnerability is fixed in 1.7.9.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","score":3.5,"severity":null}],"references":["https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-2v5f-5r6w-p67r"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30489","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 14, 2026, 9:00:49 PM","dateUpdated":"May 16, 2026, 1:06:38 AM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-30489","identifiers":["EUVD-2026-30489","CVE-2026-45781","GHSA-2v5f-5r6w-p67r"]},"retained":false,"historicalAffected":[]}],"coverage":[]}