Resource exhaustion in OpenClaw - #VU149033
Published: September 12, 2026
Vulnerability identifier: #VU149033
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the Browser extension relay\'s global pending-authentication pool when processing unauthenticated WebSocket upgrades. A remote attacker can reserve all pending authentication slots before proving possession of the relay key to cause a denial of service.
Paired Chrome extensions cannot complete Browser Relay Authentication v2 while the pending-authentication capacity is saturated.
Affected software
OpenClaw
Remediation
Install security update from vendor's website.
OpenClaw - update to 2026.8.2