CVE-2026-77321

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Source
https://cve.org/CVERecord?id=CVE-2026-77321
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77321.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77321
Aliases
  • GHSA-qvw8-w937-vcmq
Published
2026-09-24T18:04:05Z
Modified
2026-09-27T03:30:27Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
TREK MCP trip summary bypasses delegated OAuth read scopes
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-200",
        "CWE-284",
        "CWE-862"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77321.json"
}
References

Affected packages

Git / github.com/liketrek/trek

Affected ranges

Type
GIT
Repo
https://github.com/liketrek/trek
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
19064b39176660f3be3a2df198c87949504046e2
Fixed
f9c992ec9363301762ac00e97747c1dd0fe37d6b
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "3.3.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

plugin-sdk-v1.*
plugin-sdk-v1.3.0
plugin-sdk-v1.3.1
v2.*
v2.1.0
v2.3.5
v2.4.0
v2.5.0
v2.5.1
v2.5.2
v2.5.4
v2.5.5
v2.5.6
v2.5.7
v2.6.0
v2.6.1
v2.6.2
v2.7.0
v2.7.2
v2.8.0
v2.8.4
v2.9.10
v2.9.11
v2.9.12
v2.9.13
v2.9.14
v2.9.2
v2.9.4
v2.9.5
v2.9.6
v2.9.7
v2.9.8
v2.9.9
v3.*
v3.0.0
v3.0.1
v3.0.10
v3.0.11
v3.0.12
v3.0.13
v3.0.14
v3.0.15
v3.0.16
v3.0.17
v3.0.18
v3.0.19
v3.0.2
v3.0.20
v3.0.21
v3.0.22
v3.0.3
v3.0.4
v3.0.5
v3.0.6
v3.0.7
v3.0.8
v3.0.9
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.2.0
v3.2.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77321.json"