# CVE-2026-77384

## Summary

- **CVE ID:** CVE-2026-77384
- **Severity:** HIGH
- **CVSS Score:** 7.5 (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:** Aug 24, 2026
- **Last Modified:** Aug 25, 2026

## Description

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.

## Affected Products

- libp2p — js-libp2p (>= 2.1.5, < 4.2.9)

## References

- [CNA](https://github.com/libp2p/js-libp2p/security/advisories/GHSA-x787-gh7p-hmq7)
- [CNA](https://github.com/libp2p/js-libp2p/commit/4bb8fbe8d3f3590e4af51a1f5f7de56fffa5804d)
- [CNA](https://github.com/libp2p/js-libp2p/releases/tag/circuit-relay-v2-v4.2.9)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 26.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._