OpenClaw: Gateway WebSocket Denial of Service via unbounded pre-auth upgrades

高 7.5CVE-2026-41399 · GHSA-f44p-c7w9-7xr7 · 28/04/2026 公開 · 17/06/2026 更新

要点

CVE-2026-41399 は openclaw (openclaw), openclaw に影響する深刻度「高」 (CVSS 7.5) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.32%（全脆弱性の 24.8% より高い）。
対処：2026.3.28 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
openclaw openclaw	`< 2026.3.28`	`2026.3.28`
openclaw npm	`< 2026.3.28`	`2026.3.28`

概要

Summary

The gateway accepted unbounded concurrent unauthenticated WebSocket upgrades before allocating them to an authenticated session budget.

Impact

An unauthenticated network attacker could consume socket and worker capacity and disrupt WebSocket availability for legitimate clients.

Affected Component

src/gateway/server-http.ts, src/gateway/server/preauth-connection-budget.ts

Fixed Versions

Affected: <= 2026.3.24
Patched: >= 2026.3.28
Latest stable 2026.3.28 contains the fix.

Fix

Fixed by commit cb5f7e201f (gateway: cap concurrent pre-auth websocket upgrades).

Discovered by：Topsec AlphaLab (wang dong)

NVD の説明

OpenClaw before 2026.3.28 accepts unbounded concurrent unauthenticated WebSocket upgrades without pre-authentication budget allocation. Unauthenticated network attackers can exhaust socket and worker capacity to disrupt WebSocket availability for legitimate clients.