OpenClaw before 2026.3.22 contains an unauthenticated resource exhaustion vulnerability in voice call webhook handling that buffers request bodies before provider signature checks. Attackers can send large or malicious webhook requests to exhaust server resources without authentication by bypassing signature validation.
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
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/651dc7450b68a5396a009db78ef93826337…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-rm59-992w-x2mv
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-unauthenticated-resource-exhausti…
disclosure@vulncheck.com