Cross-site scripting in OpenClaw - CVE-2026-27009
Published: May 4, 2026
Vulnerability identifier: #VU129425
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-27009
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary JavaScript in the Control UI origin.
The vulnerability exists due to cross-site scripting in the Control UI inline script rendering of assistant identity values when rendering assistant name or avatar values into an inline script block without script-context-safe escaping. A local user can set a crafted assistant identity value to execute arbitrary JavaScript in the Control UI origin.
User interaction is required for a Control UI visitor to load the affected interface.
How to mitigate CVE-2026-27009
Install security update from vendor's website.