OpenClaw: Synology Chat Webhook Pre-Auth Rate-Limit Bypass Enables Brute-Force Guessing of Webhook Token

中 6.5CVE-2026-35646 · GHSA-mf5g-6r6f-ghhm · 09/04/2026 公開 · 17/06/2026 更新

要点

CVE-2026-35646 は openclaw (openclaw), openclaw に影響する深刻度「中」 (CVSS 6.5) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.24%（全脆弱性の 15.7% より高い）。
対処：2026.3.25, 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	`< 2026.3.25`	`2026.3.25`
openclaw npm	`< 2026.3.28`	`2026.3.28`

概要

Summary

Synology Chat Webhook Pre-Auth Rate-Limit Bypass Enables Brute-Force Guessing of Weak Webhook Token

Affected Packages / Versions

Package: openclaw
Affected versions: <= 2026.3.24
First patched version: 2026.3.25
Latest published npm version at verification time: 2026.3.24

Details

Synology Chat webhook auth previously rejected invalid tokens without throttling repeated guesses, allowing brute-force attempts against weak webhook secrets. Commit 0b4d07337467f4d40a0cc1ced83d45ceaec0863c adds repeated-guess throttling before auth failure responses.

Verified vulnerable on tag v2026.3.24 and fixed on main by commit 0b4d07337467f4d40a0cc1ced83d45ceaec0863c.

Fix Commit(s)

0b4d07337467f4d40a0cc1ced83d45ceaec0863c

NVD の説明

OpenClaw before 2026.3.25 contains a pre-authentication rate-limit bypass vulnerability in webhook token validation that allows attackers to brute-force weak webhook secrets. The vulnerability exists because invalid webhook tokens are rejected without throttling repeated authentication attempts, enabling attackers to guess weak tokens through rapid successive requests.