{"id":"CVE-2026-77321","title":"TREK is a collaborative travel planner","summary":"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 th…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-200","CWE-284","CWE-862"],"vendor":"mauriceboe","product":"TREK","affected":["TREK < 3.3.0"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T19:17:16.887","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77321","references":[{"url":"https://github.com/liketrek/TREK/commit/19064b39176660f3be3a2df198c87949504046e2","label":"security-advisories@github.com"},{"url":"https://github.com/liketrek/TREK/pull/1520","label":"security-advisories@github.com"},{"url":"https://github.com/liketrek/TREK/releases/tag/v3.3.0","label":"security-advisories@github.com"},{"url":"https://github.com/liketrek/TREK/security/advisories/GHSA-qvw8-w937-vcmq","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-24T18:49:36.724Z","slug":"CVE-2026-77321","body":"## Overview\n\nTREK 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}