CVE-2026-77384
libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 CWE-772 |
| Vendor | libp2p |
| Product | js-libp2p |
| Published | Aug 24, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
libp2p / js-libp2p
>= 2.1.5, < 4.2.9