{"id":"CVE-2026-11719","revision":"c432b2c858a440c4b550212c30320614","records":[{"revision":"c432b2c858a440c4b550212c30320614","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-11719","aliases":[],"title":"An authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope enforcement across older protocol handlers.","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":"2026-06-18T11:55:03.666+00:00","modifiedAt":"2026-06-18T13:53:08.793+00:00","affected":[{"ecosystem":"Vendor product","name":"MCP Toolbox for Databases (googleapis/mcp-toolbox)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Google\",\n                    \"product\": \"MCP Toolbox for Databases (googleapis/mcp-toolbox)\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"1.3.0\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","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":8.6,"severity":"HIGH"}],"references":["https://github.com/googleapis/mcp-toolbox/pull/3335","https://github.com/googleapis/mcp-toolbox/pull/3049"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-11719","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-11719","identifiers":["CVE-2026-11719"]},"retained":false,"historicalAffected":[]}],"coverage":[]}