---
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'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.