Description
Telepresence enables local development against a remote Kubernetes or OpenShift cluster. Prior to 2.31.0, the Traffic Manager Tunnel gRPC streaming endpoint parses a session ID from the first bytes of a caller-controlled message in pkg/tunnel/message.go and passes it to state.Tunnel without verifying that the caller owns the active session. An attacker who obtains a valid active session ID through log leakage, cluster-internal channels, or the unauthenticated ArriveAsClient endpoint can attach a routed tunnel to that session and gain its network routing capabilities. UUID4 session IDs make cold brute force impractical. This vulnerability is fixed in 2.31.0.
Metrics
CVSS 3.1 8.2/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:NWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| telepresenceio | telepresence | < 2.31.0 |
References
- https://github.com/telepresenceio/telepresence/commit/1312482488b771742dbedd3015f9a81a27532de6
- https://github.com/telepresenceio/telepresence/commit/36458b65a010d2b316af48cd90e193ba190785d9
- https://github.com/telepresenceio/telepresence/pull/4217
- https://github.com/telepresenceio/telepresence/releases/tag/v2.31.0
- https://github.com/telepresenceio/telepresence/security/advisories/GHSA-6j3h-rp73-6rvf
Timeline
- Published
- Nov 4, 2026
- Last modified
- Nov 12, 2026
- NVD status
- Awaiting Analysis