Bug 2567445 (CVE-2026-102340)

Summary: CVE-2026-102340 github.com/telepresenceio/telepresence: Telepresence: Information disclosure via unauthenticated Traffic Manager API
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Telepresence. The Traffic Manager fails to authenticate internal cluster requests or verify Role-Based Access Control (RBAC) permissions when registering clients and creating service intercepts. An attacker with access to any pod on the cluster network can exploit this flaw to register within arbitrary namespaces, intercept service traffic, and access sensitive information including application secrets, tokens, and environment variables.
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Description OSIDB Bzimport 2026-11-05 21:58:22 UTC 
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.