{"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": "2026-08-24T21:06:39.909Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "js-libp2p", "vendor": "libp2p", "versions": [{"status": "affected", "version": ">= 2.1.5, < 4.2.9"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-77384", "lastModified": "2026-08-24T22:17:19.650", "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": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-24T22:17:19.650", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d"}, {"source": "security-advisories@github.com", "url": "https://github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-772"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}