{"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": "2026-09-24T18:04:05.947Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "TREK", "vendor": "mauriceboe", "versions": [{"status": "affected", "version": "< 3.3.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-77321", "lastModified": "2026-09-24T19:17:16.887", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-24T19:17:16.887", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/liketrek/TREK/commit/19064b39176660f3be3a2df198c87949504046e2"}, {"source": "security-advisories@github.com", "url": "https://github.com/liketrek/TREK/pull/1520"}, {"source": "security-advisories@github.com", "url": "https://github.com/liketrek/TREK/releases/tag/v3.3.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/liketrek/TREK/security/advisories/GHSA-qvw8-w937-vcmq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-284"}, {"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}