Resource exhaustion in Libp2p Js-Libp2p
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.
Vulnerability class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Libp2p Js-libp2p — versions >= 2.1.5, < 4.2.9
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-77384?
- CVE-2026-77384 is a high-severity vulnerability in Libp2p Js-Libp2p, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-24.
- How severe is CVE-2026-77384?
- High severity. CVSS v3 base score is 7.5 out of 10.