# CVE-2026-102340: Telepresence: Traffic Manager gRPC has no auth — any pod claims arbitrary namespace and intercepts services, receiving victim environment secrets

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

Telepresence enables local development against a remote Kubernetes or OpenShift cluster. Prior to 2.31.0, the Traffic Manager gRPC API on port 8081 accepts unauthenticated cluster-network callers, ArriveAsClient stores a caller-supplied Namespace using only the ManagesNamespace manager watchlist check, and CreateIntercept can target any managed namespace without checking the session's Kubernetes RBAC. An attacker operating any pod with network access to the manager can register in an arbitrary managed namespace, create service intercepts, receive intercepted traffic, and obtain the victim pod's complete container environment, including secrets, tokens, and API keys. The default cluster-wide deployment manages all namespaces. This vulnerability is fixed in 2.31.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- telepresenceio / telepresence: < 2.31.0 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.5 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-306, CWE-862

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/telepresenceio/telepresence/security/advisories/GHSA-j8j4-rw65-56r6 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/telepresenceio/telepresence/pull/4217 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/telepresenceio/telepresence/commit/04ec3464fe8878fdc96420cdc8036edefa0dc9ae (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/telepresenceio/telepresence/commit/36458b65a010d2b316af48cd90e193ba190785d9 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/telepresenceio/telepresence/commit/6871235b674a6e843908d09696354c4b0f91578c (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/telepresenceio/telepresence/releases/tag/v2.31.0 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-102340; retrieved 2026-11-04; source updated 2026-11-04

Revision: 995e2911fd75eeed70ebcbb5f16a8b5b3d81f8470250b7a4c311255eb9905b8b

Canonical: https://y2.dev/cve/CVE-2026-102340

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