{"schema_version":"1.3.1","id":"GO-2026-5251","modified":"2026-06-25T18:43:15Z","published":"2026-06-25T18:43:15Z","aliases":["CVE-2026-11717","GHSA-8fcc-w5hv-4gxv"],"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","affected":[{"package":{"name":"github.com/googleapis/mcp-toolbox","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.4.0"}]}],"ecosystem_specific":{}}],"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-8fcc-w5hv-4gxv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11717"},{"type":"FIX","url":"https://github.com/googleapis/mcp-toolbox/pull/3341"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-5251","review_status":"UNREVIEWED"}}