{"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 \u2014 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"}}}}

{}

{"affected": [{"affectedData": [{"product": "telepresence", "vendor": "telepresenceio", "versions": [{"status": "affected", "version": "< 2.31.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-102339", "lastModified": "2026-11-04T21:17:40.500", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 1.8, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-04T21:17:40.500", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/telepresenceio/telepresence/commit/1312482488b771742dbedd3015f9a81a27532de6"}, {"source": "security-advisories@github.com", "url": "https://github.com/telepresenceio/telepresence/commit/36458b65a010d2b316af48cd90e193ba190785d9"}, {"source": "security-advisories@github.com", "url": "https://github.com/telepresenceio/telepresence/pull/4217"}, {"source": "security-advisories@github.com", "url": "https://github.com/telepresenceio/telepresence/releases/tag/v2.31.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/telepresenceio/telepresence/security/advisories/GHSA-6j3h-rp73-6rvf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-11-04T21:30:09.550815+00:00", "updated": "2026-11-04T21:30:09.550822+00:00", "vendors": []}