XSS in Openclaw

CVE-2026-27009

OpenClaw is a personal AI assistant. Prior to version 2026.2.15, a atored XSS issue in the OpenClaw Control UI when rendering assistant identity (name/avatar) into an inline `<script>` tag without script-context-safe escaping. A crafted value containing `</script>` could break out of the script tag and execute attacker-controlled JavaScript in the Control UI origin. Version 2026.2.15 removed inline script injection and serve bootstrap config from a JSON endpoint and added a restrictive Content Security Policy for the Control UI (`script-src 'self'`, no inline scripts).

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (13.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-27009?
CVE-2026-27009 is a medium-severity vulnerability in Openclaw, classified under Cross-site Scripting. CVSS score: 5.8/10. Published 2026-02-20.
How severe is CVE-2026-27009?
Medium severity. CVSS v3 base score is 5.8 out of 10.