{"id":"CVE-2026-11719","sourceIdentifier":"cve-coordination@google.com","published":"2026-06-18T14:17:20.357","lastModified":"2026-10-26T11:10:00.157","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"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)."},{"lang":"es","value":"Una vulnerabilidad de omisión de autorización autenticada existe en MCP Toolbox para Bases de Datos debido a la falta de aplicación del alcance en gestores de protocolo más antiguos.\n\nMientras que el gestor de la versión de protocolo 2025-11-25 aplica correctamente las restricciones por herramienta definidas por scopesRequired, las versiones de protocolo compatibles más antiguas (2025-06-18, 2025-03-26 y 2024-11-05) omiten esta verificación. Un cliente autenticado con tokens de bajo privilegio (p. ej., ’read’) puede omitir las restricciones de alcance por herramienta previstas y ejecutar herramientas de alto privilegio (p. ej., ’admin’) simplemente especificando una versión de protocolo más antigua en el encabezado MCP-Protocol-Version, o al omitir el encabezado por completo (lo que hace que el servidor utilice por defecto el gestor vulnerable 2024-11-05)."}],"affected":[{"source":"cve-coordination@google.com","affectedData":[{"vendor":"Google","product":"MCP Toolbox for Databases (googleapis/mcp-toolbox)","defaultStatus":"unaffected","versions":[{"version":"1.3.0","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"cve-coordination@google.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-18T12:55:43.505312Z","id":"CVE-2026-11719","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"cve-coordination@google.com","type":"Secondary","description":[{"lang":"en","value":"CWE-862"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:google:mcp_toolbox_for_databases:1.3.0:*:*:*:*:*:*:*","matchCriteriaId":"513EFF85-FEE8-4F72-8EA6-3FCCCE55C14B"}]}]}],"references":[{"url":"https://github.com/googleapis/mcp-toolbox/pull/3049","source":"cve-coordination@google.com","tags":["Patch"]},{"url":"https://github.com/googleapis/mcp-toolbox/pull/3335","source":"cve-coordination@google.com","tags":["Patch"]}]}