OpenClaw versions prior to 2026.3.2 contain a denial of service vulnerability in webhook handlers for BlueBubbles and Google Chat that parse request bodies before performing authentication and signature validation. Unauthenticated attackers can exploit this by sending slow or oversized request bodies to exhaust parser resources and degrade service availability.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Openclaw Openclaw
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
|
— |
2026.3.2
|
References 3
https://github.com/openclaw/openclaw/commit/d3e8b17aa6432536806b4853edc7939d891…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-x4vp-4235-65hg
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-slow-request-denial-of-service-vi…
disclosure@vulncheck.com