Improper access control in OpenClaw - #VU129398
Published: May 4, 2026
Vulnerability identifier: #VU129398
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to interfere with extension-relay behavior.
The vulnerability exists due to improper access control in the /extension endpoint when handling WebSocket upgrade requests. A local user can connect to the endpoint without the token to interfere with extension-relay behavior.
Only instances with the optional Chrome extension relay enabled are vulnerable.
Affected software
OpenClaw
Remediation
Install security update from vendor's website.
OpenClaw - update to 2026.2.19