CVE-2026-77384

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

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-25)

CWEs

CWE-400, CWE-772

Published

2026-08-24

Modified

2026-10-12

Record from

the NVD, synced 2026-10-19

References

• 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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