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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (11.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Openclaw — versions < 2026.2.15
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-37gc-85xm-2ww6 (Exploit, Patch, Vendor Advisory)
- github.com/openclaw/openclaw/commit/3b4096e02e7e335f99f5986ec1bd566e90b14a7e (Patch)
- github.com/openclaw/openclaw/commit/adc818db4a4b3b8d663e7674ef20436947514e1b (Patch)
- github.com/openclaw/openclaw/releases/tag/v2026.2.15 (Product, Release Notes)
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.