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GHSA-MF5G-6R6F-GHHM: GHSA-MF5G-6R6F-GHHM: Pre-Authentication Rate-Limit Bypass in OpenClaw Synology Chat Plugin

#security #cve #cybersecurity #ghsa

GHSA-MF5G-6R6F-GHHM: Pre-Authentication Rate-Limit Bypass in OpenClaw Synology Chat Plugin

Vulnerability ID: GHSA-MF5G-6R6F-GHHM
CVSS Score: 5.3
Published: 2026-03-29

The OpenClaw personal AI assistant suffers from an Improper Restriction of Excessive Authentication Attempts (CWE-307) vulnerability within its Synology Chat integration. Due to improper placement of rate-limiting logic, unauthenticated attackers can continuously brute-force webhook authentication tokens without triggering defensive mechanisms, potentially leading to unauthorized message spoofing and unauthenticated interaction with the underlying AI models.

TL;DR

A structural flaw in OpenClaw's Synology Chat plugin allows attackers to bypass rate limits and brute-force webhook authentication tokens, enabling unauthorized interaction with the AI assistant.

⚠️ Exploit Status: POC

Technical Details

  • CWE ID: CWE-307
  • Attack Vector: Network
  • CVSS Score: 5.3
  • Impact: Unauthorized Webhook Access / Message Spoofing
  • Exploit Status: Proof of Concept
  • KEV Status: Not Listed

Affected Systems

  • OpenClaw synology-chat plugin
  • Node.js (npm: openclaw)
  • openclaw: < 2026.3.26 (Fixed in: 2026.3.26)

Code Analysis

Commit: 0b4d073

Fix rate limiting logic by introducing InvalidTokenRateLimiter

Mitigation Strategies

  • Upgrade openclaw package to patched version
  • Rotate webhook tokens to high-entropy strings
  • Ensure proper X-Forwarded-For proxy configuration

Remediation Steps:

  1. Update the npm package openclaw to version 2026.3.26 or later.
  2. Navigate to the Synology Chat integration settings and rotate the existing webhook token.
  3. Generate a new token consisting of at least 32 cryptographically random alphanumeric characters.
  4. Configure any reverse proxies (e.g., Nginx, HAProxy) in front of OpenClaw to properly append the client IP to the X-Forwarded-For header.

References

Read the full report for GHSA-MF5G-6R6F-GHHM on our website for more details including interactive diagrams and full exploit analysis.

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