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.
History

Tue, 25 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 24 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
Description 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.
Title libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion
Weaknesses CWE-400
CWE-772
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-08-24T21:06:39.909Z

Updated: 2026-08-25T19:04:25.322Z

Reserved: 2026-08-20T19:36:13.806Z

Link: CVE-2026-77384

cve-icon Vulnrichment

Updated: 2026-08-25T19:04:20.929Z

cve-icon NVD

Status : Deferred

Published: 2026-08-24T22:17:19.650

Modified: 2026-09-09T21:07:31.353

Link: CVE-2026-77384

cve-icon Redhat

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