{"id":"CVE-2026-77321","published":"2026-09-24T19:17:16.887","lastModified":"2026-09-25T13:17:26.220","description":"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.","cvssScore":4.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-200","CWE-284","CWE-862"],"vendors":[],"products":[],"references":[{"url":"https://github.com/liketrek/TREK/commit/19064b39176660f3be3a2df198c87949504046e2","tags":[]},{"url":"https://github.com/liketrek/TREK/pull/1520","tags":[]},{"url":"https://github.com/liketrek/TREK/releases/tag/v3.3.0","tags":[]},{"url":"https://github.com/liketrek/TREK/security/advisories/GHSA-qvw8-w937-vcmq","tags":[]}],"exploitRefs":[{"url":"https://github.com/liketrek/TREK/commit/19064b39176660f3be3a2df198c87949504046e2","tags":[]},{"url":"https://github.com/liketrek/TREK/pull/1520","tags":[]},{"url":"https://github.com/liketrek/TREK/releases/tag/v3.3.0","tags":[]},{"url":"https://github.com/liketrek/TREK/security/advisories/GHSA-qvw8-w937-vcmq","tags":[]}],"hasPoc":true,"ai":null}