{"api_version":"1","generated_at":"2026-10-20T13:38:50+00:00","cve":"CVE-2026-103936","urls":{"html":"https://cve.report/CVE-2026-103936","api":"https://cve.report/api/cve/CVE-2026-103936.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-103936","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103936"},"summary":{"title":"libp2p: Single pre-auth STUN packet terminates `@libp2p/webrtc` WebRTC-direct Node.js listeners","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-10-15 18:17:22","updated_at":"2026-10-16 20:04:29"},"problem_types":["CWE-248","CWE-755","CWE-248 CWE-248: Uncaught Exception","CWE-755 CWE-755: Improper Handling of Exceptional Conditions"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"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":[{"url":"https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5f38da59e379dc051b2789e46f6","name":"https://github.com/libp2p/js-libp2p/commit/68794c8e2e67d5f38da59e379dc051b2789e46f6","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/libp2p/js-libp2p/releases/tag/webrtc-v6.0.28","name":"https://github.com/libp2p/js-libp2p/releases/tag/webrtc-v6.0.28","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x3m2-6mg8-vj7f","name":"https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x3m2-6mg8-vj7f","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/libp2p/js-libp2p/pull/3584","name":"https://github.com/libp2p/js-libp2p/pull/3584","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103936","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103936","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"libp2p","product":"js-libp2p","version":"affected < 3.3.7","platforms":[]},{"source":"CNA","vendor":"@libp2p","product":"webrtc","version":"affected < 6.0.28","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"103936","cve":"CVE-2026-103936","epss":"0.005220000","percentile":"0.429980000","score_date":"2026-10-16","updated_at":"2026-10-17 00:14:15"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-103936","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-10-16T15:22:18.274644Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-10-16T17:12:49.532Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"js-libp2p","vendor":"libp2p","versions":[{"status":"affected","version":"< 3.3.7"}]},{"product":"webrtc","vendor":"@libp2p","versions":[{"status":"affected","version":"< 6.0.28"}]}],"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."}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-755","description":"CWE-755: Improper Handling of Exceptional Conditions","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-15T17:28:32.567Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"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"}],"source":{"advisory":"GHSA-x3m2-6mg8-vj7f","discovery":"UNKNOWN"},"title":"libp2p: Single pre-auth STUN packet terminates `@libp2p/webrtc` WebRTC-direct Node.js listeners"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-103936","datePublished":"2026-10-15T17:28:32.567Z","dateReserved":"2026-10-01T14:20:19.156Z","dateUpdated":"2026-10-16T17:12:49.532Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-15 18:17:22","lastModifiedDate":"2026-10-16 20:04:29","problem_types":["CWE-248","CWE-755","CWE-248 CWE-248: Uncaught Exception","CWE-755 CWE-755: Improper Handling of Exceptional Conditions"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-16T15:22:18.274644Z","id":"CVE-2026-103936","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"103936","Ordinal":"1","Title":"libp2p: Single pre-auth STUN packet terminates `@libp2p/webrtc` ","CVE":"CVE-2026-103936","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"103936","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"libp2p: Single pre-auth STUN packet terminates `@libp2p/webrtc` "}]}}}