CVE-2026-77384: CWE-400: Uncontrolled Resource Consumption in libp2p js-libp2p
CVE-2026-77384 is a high-severity vulnerability in the JavaScript implementation of libp2p (js-libp2p) prior to version 4.2.9. It involves uncontrolled resource consumption due to repeated registration of abort listeners on reservation refresh requests in the circuit relay component. This flaw can lead to denial of service by causing unbounded growth of listeners and closures on relay servers. The issue is fixed in version 4.2.9.
AI Analysis
Technical Summary
The vulnerability in js-libp2p's reservation-store.ts arises because the reservation refresh path reuses the same retimeableSignal but unconditionally registers an additional abort listener on every refresh. A remote peer can exploit this by repeatedly sending valid RESERVE requests for the same reservation, causing unbounded listener and closure growth in @libp2p/circuit-relay-v2 relay servers. This leads to denial of service conditions. The problem is resolved in version 4.2.9.
Potential Impact
An attacker can cause denial of service on relay servers by triggering unbounded resource consumption through repeated reservation refresh requests. This does not affect confidentiality or integrity but impacts availability of the relay service.
Mitigation Recommendations
Upgrade js-libp2p to version 4.2.9 or later, where this issue is fixed. No other mitigation or temporary workaround is documented. Patch status is not explicitly confirmed in vendor advisory, but the fix is stated to be in version 4.2.9.
CVE-2026-77384: CWE-400: Uncontrolled Resource Consumption in libp2p js-libp2p
Description
CVE-2026-77384 is a high-severity vulnerability in the JavaScript implementation of libp2p (js-libp2p) prior to version 4.2.9. It involves uncontrolled resource consumption due to repeated registration of abort listeners on reservation refresh requests in the circuit relay component. This flaw can lead to denial of service by causing unbounded growth of listeners and closures on relay servers. The issue is fixed in version 4.2.9.
CVSS v3.1
Score 7.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in js-libp2p's reservation-store.ts arises because the reservation refresh path reuses the same retimeableSignal but unconditionally registers an additional abort listener on every refresh. A remote peer can exploit this by repeatedly sending valid RESERVE requests for the same reservation, causing unbounded listener and closure growth in @libp2p/circuit-relay-v2 relay servers. This leads to denial of service conditions. The problem is resolved in version 4.2.9.
Potential Impact
An attacker can cause denial of service on relay servers by triggering unbounded resource consumption through repeated reservation refresh requests. This does not affect confidentiality or integrity but impacts availability of the relay service.
Mitigation Recommendations
Upgrade js-libp2p to version 4.2.9 or later, where this issue is fixed. No other mitigation or temporary workaround is documented. Patch status is not explicitly confirmed in vendor advisory, but the fix is stated to be in version 4.2.9.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-20T19:36:13.806Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8cb63cacd9273b4924aae4
Added to database: 08/24/2026, 21:23:08 UTC
Last enriched: 08/24/2026, 21:37:07 UTC
Last updated: 08/24/2026, 22:31:34 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.