{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103936", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-01T14:20:19.156Z", "datePublished": "2026-10-15T17:28:32.567Z", "dateUpdated": "2026-10-15T17:28:32.567Z"}, "containers": {"cna": {"title": "libp2p: Single pre-auth STUN packet terminates `@libp2p/webrtc` WebRTC-direct Node.js listeners", "problemTypes": [{"descriptions": [{"cweId": "CWE-248", "lang": "en", "description": "CWE-248: Uncaught Exception", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-755", "lang": "en", "description": "CWE-755: Improper Handling of Exceptional Conditions", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x3m2-6mg8-vj7f", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x3m2-6mg8-vj7f"}, {"name": "https://github.com/libp2p/js-libp2p/pull/3584", "tags": ["x_refsource_MISC"], "url": "https://github.com/libp2p/js-libp2p/pull/3584"}, {"name": "https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5f38da59e379dc051b2789e46f6", "tags": ["x_refsource_MISC"], "url": "https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5f38da59e379dc051b2789e46f6"}, {"name": "https://github.com/libp2p/js-libp2p/releases/tag/webrtc-v6.0.28", "tags": ["x_refsource_MISC"], "url": "https://github.com/libp2p/js-libp2p/releases/tag/webrtc-v6.0.28"}], "affected": [{"vendor": "libp2p", "product": "js-libp2p", "versions": [{"version": "< 3.3.7", "status": "affected"}]}, {"vendor": "@libp2p", "product": "webrtc", "versions": [{"version": "< 6.0.28", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-15T17:28:32.567Z"}, "descriptions": [{"lang": "en", "value": "libp2p is a JavaScript implementation of the libp2p networking stack. Prior to 6.0.28, the @libp2p/webrtc webRTCDirect() Node.js listener processes unauthenticated STUN Binding Requests before PeerId authentication, Noise, muxing, protocol negotiation, connection creation, or connection-manager admission. The listener in packages/transport-webrtc/src/private-to-public/utils/stun-listener.ts forwards the packet-controlled request.ufrag into DirectRTCPeerConnection.setLocalDescription, where the value is reused as an ICE password without validating its required length and character set. A short credential causes node-datachannel or libdatachannel to raise an uncaught native invalid_argument and abort the process with SIGABRT, allowing a single remote UDP packet to deny service. The confirmed impact is process termination only, with no demonstrated memory corruption, code execution, browser impact, confidentiality impact, integrity impact, or connection-limit bypass. This issue is fixed in version 6.0.28."}], "source": {"advisory": "GHSA-x3m2-6mg8-vj7f", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "js-libp2p", "vendor": "libp2p", "versions": [{"status": "affected", "version": "< 3.3.7"}]}, {"product": "webrtc", "vendor": "@libp2p", "versions": [{"status": "affected", "version": "< 6.0.28"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libp2p is a JavaScript implementation of the libp2p networking stack. Prior to 6.0.28, the @libp2p/webrtc webRTCDirect() Node.js listener processes unauthenticated STUN Binding Requests before PeerId authentication, Noise, muxing, protocol negotiation, connection creation, or connection-manager admission. The listener in packages/transport-webrtc/src/private-to-public/utils/stun-listener.ts forwards the packet-controlled request.ufrag into DirectRTCPeerConnection.setLocalDescription, where the value is reused as an ICE password without validating its required length and character set. A short credential causes node-datachannel or libdatachannel to raise an uncaught native invalid_argument and abort the process with SIGABRT, allowing a single remote UDP packet to deny service. The confirmed impact is process termination only, with no demonstrated memory corruption, code execution, browser impact, confidentiality impact, integrity impact, or connection-limit bypass. This issue is fixed in version 6.0.28."}], "id": "CVE-2026-103936", "lastModified": "2026-10-15T18:17:22.433", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-10-15T18:17:22.433", "references": [{"source": "[email protected]", "url": "https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5f38da59e379dc051b2789e46f6"}, {"source": "[email protected]", "url": "https://github.com/libp2p/js-libp2p/pull/3584"}, {"source": "[email protected]", "url": "https://github.com/libp2p/js-libp2p/releases/tag/webrtc-v6.0.28"}, {"source": "[email protected]", "url": "https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x3m2-6mg8-vj7f"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-248"}, {"lang": "en", "value": "CWE-755"}], "source": "[email protected]", "type": "Primary"}]}

{}

{}