CVE-2026-102339

8.2 HIGH 0.3% exploit odds Fix listed Auth & access Server

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-09-28 22:38 UTC ReservedThe CVE id was reserved by its CNA
2026-11-04 21:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-11-09 17:17 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.3% in the next 30 days (EPSS).
Severity: 8.2 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-11-04 21:17 UTC
Last modified: 2026-11-09 17:17 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-639 · Insecure direct object reference
Record status: Received

Attack profile CVSS 3.1 · 8.2

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: None

Raw vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record