{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77384","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-20T19:36:13.806Z","datePublished":"2026-08-24T21:06:39.909Z","dateUpdated":"2026-08-25T19:04:25.322Z"},"containers":{"cna":{"title":"libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion","problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-772","lang":"en","description":"CWE-772: Missing Release of Resource after Effective Lifetime","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-x787-gh7p-hmq7","tags":["x_refsource_CONFIRM"],"url":"https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7"},{"name":"https://github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d","tags":["x_refsource_MISC"],"url":"https://github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d"},{"name":"https://github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9","tags":["x_refsource_MISC"],"url":"https://github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9"}],"affected":[{"vendor":"libp2p","product":"js-libp2p","versions":[{"version":">= 2.1.5, < 4.2.9","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-24T21:06:39.909Z"},"descriptions":[{"lang":"en","value":"libp2p is a JavaScript implementation of the libp2p networking stack. Prior to version 4.2.9, the reservation refresh path in reservation-store.ts reuses the same retimeableSignal but unconditionally registers another abort listener on every refresh. As a result, a remote peer can repeatedly send valid RESERVE requests for the same reservation, causing unbounded listener and closure growth in @libp2p/circuit-relay-v2 relay servers and leading to denial of service. This issue is fixed in version 4.2.9."}],"source":{"advisory":"GHSA-x787-gh7p-hmq7","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-25T19:03:46.256710Z","id":"CVE-2026-77384","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-25T19:04:25.322Z"}}]}}