{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77321","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-20T19:24:11.617Z","datePublished":"2026-09-24T18:04:05.947Z","dateUpdated":"2026-10-05T15:32:36.028Z"},"containers":{"cna":{"title":"TREK MCP trip summary bypasses delegated OAuth read scopes","problemTypes":[{"descriptions":[{"cweId":"CWE-200","lang":"en","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/liketrek/TREK/security/advisories/GHSA-qvw8-w937-vcmq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/liketrek/TREK/security/advisories/GHSA-qvw8-w937-vcmq"},{"name":"https://github.com/liketrek/TREK/pull/1520","tags":["x_refsource_MISC"],"url":"https://github.com/liketrek/TREK/pull/1520"},{"name":"https://github.com/liketrek/TREK/commit/19064b39176660f3be3a2df198c87949504046e2","tags":["x_refsource_MISC"],"url":"https://github.com/liketrek/TREK/commit/19064b39176660f3be3a2df198c87949504046e2"},{"name":"https://github.com/liketrek/TREK/releases/tag/v3.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/liketrek/TREK/releases/tag/v3.3.0"}],"affected":[{"vendor":"mauriceboe","product":"TREK","versions":[{"version":"< 3.3.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-24T18:04:05.947Z"},"descriptions":[{"lang":"en","value":"TREK is a collaborative travel planner. Prior to 3.3.0, the get_trip_summary tool in server/src/mcp/tools/trips.ts is registered for scoped OAuth MCP tokens without requiring trips:read and returns core trip summary data regardless of the delegated scopes. A token granted only an unrelated capability, such as weather:read, can receive trip metadata, member email addresses from server/src/services/tripService.ts, itinerary days, and accommodations for every trip accessible to the token's user. Cross-user trip authorization remains enforced, but the missing scope check defeats the consented least-privilege boundary and exposes trip content and third-party contact information to an MCP client that was not authorized to read it. This issue is fixed in version 3.3.0."}],"source":{"advisory":"GHSA-qvw8-w937-vcmq","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-05T14:47:04.222887Z","id":"CVE-2026-77321","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-05T15:32:36.028Z"}}]}}