libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77384
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-24 22:17:19 UTC
Updated2026-08-25 19:16:54 UTC
Descriptionlibp2p 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.003390000 probability, percentile 0.263680000 (date 2026-08-25)

Problem Types: CWE-400 | CWE-772 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-772 CWE-772: Missing Release of Resource after Effective Lifetime

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Libp2p Js-libp2p affected >= 2.1.5, < 4.2.9 Not specified

References

ReferenceSourceLinkTags
github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9 [email protected] github.com
github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d [email protected] github.com
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