{"id":"GHSA-5gf6-gc35-xjpc","revision":"ebbe97a218ff41d181774e3510cfd16a","records":[{"revision":"ebbe97a218ff41d181774e3510cfd16a","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-5gf6-gc35-xjpc","aliases":["CVE-2026-11719","GO-2026-5144"],"title":"MCP Toolbox for Databases: authenticated authorization bypass","description":"An authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope enforcement across older protocol handlers.\n\nWhile the 2025-11-25 protocol version handler correctly enforces per-tool restrictions defined by scopesRequired, older supported protocol versions (2025-06-18, 2025-03-26, and 2024-11-05) omit this check. An authenticated client with low-privilege tokens (e.g., read) can bypass the intended per-tool scope restrictions and execute high-privilege tools (e.g., admin) simply by specifying an older protocol version in the MCP-Protocol-Version header, or by omitting the header entirely (which causes the server to default to the vulnerable 2024-11-05 handler).","state":0,"publishedAt":"2026-06-18T15:32:02+00:00","modifiedAt":"2026-06-25T18:56:14.1765272+00:00","affected":[{"ecosystem":"Go","name":"github.com/googleapis/mcp-toolbox","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.4.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-11719","https://github.com/googleapis/mcp-toolbox/pull/3049","https://github.com/googleapis/mcp-toolbox/pull/3335","https://github.com/googleapis/mcp-toolbox"],"sourceUrl":"https://github.com/advisories/GHSA-5gf6-gc35-xjpc","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-5gf6-gc35-xjpc","identifiers":["GHSA-5gf6-gc35-xjpc","CVE-2026-11719","GO-2026-5144"]},"retained":false,"historicalAffected":[]}],"coverage":[]}