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Vulnerability record · CVE-2026-77384 · published 24 August 2026

CVE-2026-77384: Uncontrolled resource consumption vulnerability

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.

7.5 CVSS 3.1 High EPSS 0.61% · top 53.0% CWE-400 · Uncontrolled resource consumptionCWE-772 · CWE-772 Deferred
7.5CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
9 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

LinkTags
https://github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d
https://github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9
https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7
https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7

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Source: NIST National Vulnerability Database (record CVE-2026-77384), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.