{"id":"CVE-2026-77384","title":"libp2p is a JavaScript implementation of the libp2p networking stack","summary":"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 e…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-772"],"published":"2026-08-24","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:07:31.353","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77384","references":[{"url":"https://github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d","label":"security-advisories@github.com"},{"url":"https://github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9","label":"security-advisories@github.com"},{"url":"https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7","label":"security-advisories@github.com"},{"url":"https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00339,"epssPercentile":0.27458,"ingestedAt":"2026-09-09T21:22:45.549Z","slug":"CVE-2026-77384","body":"## Overview\n\nlibp2p 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}