{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102339","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-28T22:38:42.254Z","datePublished":"2026-11-04T20:35:34.030Z","dateUpdated":"2026-11-04T20:35:34.030Z"},"containers":{"cna":{"title":"Telepresence: Tunnel endpoint accepts caller-supplied session ID with no ownership proof — active client sessions hijackable","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/telepresenceio/telepresence/security/advisories/GHSA-6j3h-rp73-6rvf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/telepresenceio/telepresence/security/advisories/GHSA-6j3h-rp73-6rvf"},{"name":"https://github.com/telepresenceio/telepresence/pull/4217","tags":["x_refsource_MISC"],"url":"https://github.com/telepresenceio/telepresence/pull/4217"},{"name":"https://github.com/telepresenceio/telepresence/commit/1312482488b771742dbedd3015f9a81a27532de6","tags":["x_refsource_MISC"],"url":"https://github.com/telepresenceio/telepresence/commit/1312482488b771742dbedd3015f9a81a27532de6"},{"name":"https://github.com/telepresenceio/telepresence/commit/36458b65a010d2b316af48cd90e193ba190785d9","tags":["x_refsource_MISC"],"url":"https://github.com/telepresenceio/telepresence/commit/36458b65a010d2b316af48cd90e193ba190785d9"},{"name":"https://github.com/telepresenceio/telepresence/releases/tag/v2.31.0","tags":["x_refsource_MISC"],"url":"https://github.com/telepresenceio/telepresence/releases/tag/v2.31.0"}],"affected":[{"vendor":"telepresenceio","product":"telepresence","versions":[{"version":"< 2.31.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-04T20:35:34.030Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-6j3h-rp73-6rvf","discovery":"UNKNOWN"}}}}