{"id":"GO-2026-5706","summary":"googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken) in github.com/googleapis/mcp-toolbox","details":"googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken) in github.com/googleapis/mcp-toolbox","aliases":["CVE-2026-11718","GHSA-wcpr-6g7x-p44r"],"modified":"2026-06-25T23:01:29.657070254Z","published":"2026-06-25T22:34:38Z","database_specific":{"review_status":"UNREVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-5706"},"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-wcpr-6g7x-p44r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11718"},{"type":"FIX","url":"https://github.com/googleapis/mcp-toolbox/pull/3360"}],"affected":[{"package":{"name":"github.com/googleapis/mcp-toolbox","ecosystem":"Go","purl":"pkg:golang/github.com/googleapis/mcp-toolbox"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.4.0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-5706.json"}}],"schema_version":"1.7.5"}