{"id":"EUVD-2026-30493","revision":"f10e05a6f3c94ba692a8ab05c8e4c33f","records":[{"revision":"f10e05a6f3c94ba692a8ab05c8e4c33f","observedAt":"2026-10-28T06:07:33.888+00:00","statement":{"source":"euvd","id":"EUVD-2026-30493","aliases":["CVE-2026-44428","GHSA-95c3-6vvw-4mrq"],"title":"The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not to the specific registry in…","description":"The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not to the specific registry instance being targeted. On the client side, the publisher always appends audience=mcp-registry when requesting the GitHub Actions ID token, regardless of the selected --registry URL. On the server side, the exchange endpoint validates only that same fixed audience and then derives publish permissions directly from repository_owner. As a result, a token legitimately obtained while interacting with one registry deployment remains acceptable to any other deployment that shares the same code and audience string. This vulnerability is fixed in 1.7.6.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","score":2.1,"severity":null}],"references":["https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-95c3-6vvw-4mrq"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30493","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 14, 2026, 9:09:10 PM","dateUpdated":"May 15, 2026, 2:22:18 PM"},"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-2026-30493","identifiers":["EUVD-2026-30493","CVE-2026-44428","GHSA-95c3-6vvw-4mrq"]},"retained":false,"historicalAffected":[]}],"coverage":[]}