CVE-2026-77321
mediumTREK is a collaborative travel planner.
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/liketrek/TREK/commit/19064b39176660f3be3a2df198c87949504046e2 security-advisories@github.com
- https://github.com/liketrek/TREK/pull/1520 security-advisories@github.com
- https://github.com/liketrek/TREK/releases/tag/v3.3.0 security-advisories@github.com
- https://github.com/liketrek/TREK/security/advisories/GHSA-qvw8-w937-vcmq security-advisories@github.com