Improper Restriction of Excessive Authentication Attempts in OpenClaw - #VU135903
Published: June 30, 2026
Vulnerability identifier: #VU135903
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-307
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 improper restriction of excessive authentication attempts in the WebSocket authentication feature when handling authentication attempts over reachable WebSocket paths. A remote attacker can send repeated authentication attempts to cause a denial of service.
Exploitation requires the affected feature to be enabled and reachable, and practical impact depends on whether lower-trust input can reach that path.
Affected software
OpenClaw
Remediation
Install security update from vendor's website.
OpenClaw - update to 2026.5.26