{"action":"Upgrade github.com/googleapis/mcp-toolbox to 1.4.0 or later.","affected":[{"fixed":"1.4.0","introduced":"0"}],"component":"github.com/googleapis/mcp-toolbox","cve_ids":["CVE-2026-11717"],"ecosystem":"Go","epss":0.00176,"exploited":false,"fixed_versions":["1.4.0"],"ghsa_id":"GHSA-8fcc-w5hv-4gxv","id":"tcs_01M5KGJZ1GDZ87BT46HFY4S11T","modified_at":"2026-06-25T19:45:20.063614668Z","published_at":"2026-06-25T18:43:15Z","references":["https://osv.dev/vulnerability/GO-2026-5251","https://github.com/advisories/GHSA-8fcc-w5hv-4gxv","https://nvd.nist.gov/vuln/detail/CVE-2026-11717","https://github.com/googleapis/mcp-toolbox/pull/3341"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"GO-2026-5251","url":"https://osv.dev/vulnerability/GO-2026-5251"},{"source":"nvd","source_id":"CVE-2026-11717","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11717"}],"summary":"googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken) in github.com/googleapis/mcp-toolbox"}