CVE-2026-77384— libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion
Quick assessment
Affected
libp2p js-libp2p
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
libp2p 是 libp2p 网络栈的 JavaScript 实现。在 4.2.9 版本之前，reservation-store.ts 中的租约刷新路径会复用同一个 retimeableSignal，但在每次刷新时都会无条件地注册另一个 abort 监听器。因此，远程对等节点可以反复对同一租约发送有效的 RESERVE 请求，导致 @libp2p/circuit-relay-v2 中继服务器中监听器和闭包的数量无限制增长，从而引发拒绝服务（DoS）攻击。此问题已在 4.2.9 版本中修复。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-77384
Vulnerability Information
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Vulnerability Title
libp2p: Circuit relay v2 server reservation refresh leaks abort listeners and allows remote resource exhaustion
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-77384
| # | POC Description | Source Link | Shenlong Link |
|---|
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Qwen3.6-35B-A3B
· 9203 chars
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III. Intelligence Information for CVE-2026-77384
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Patches & Fixes for CVE-2026-77384 (1)
Vendor Advisories for CVE-2026-77384 (1)
Vendor Pages for CVE-2026-77384 (1)
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🔗 Release circuit-relay-v2: v4.2.9 · libp2p/js-libp2p · GitHub x_refsource_MISC
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V. Comments for CVE-2026-77384
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