| Component | OpenClaw |
| Severity | critical (CVSS 9.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
| Published (NVD) | 2026-07-30 |
| Last modified | 2026-09-03 |
| Affected versions | openclaw_agent_dashboard <= 1.1.0 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-79 |
| CISA KEV | not listed |
NVD description
OpenClaw Dashboard contains a stored cross-site scripting vulnerability that allows unauthenticated remote attackers to execute arbitrary JavaScript in the administrator's browser session by injecting HTML markup into agent transcript messages processed through the sessions API. Attackers can craft a message containing inline event handler payloads such as an img tag with an onerror attribute within the 60-character rendering budget, which is stored in the session transcript and interpolated unsanitized into innerHTML on the default landing page, allowing theft of session tokens and unauthorized calls to authenticated administrative endpoints including agent instruction file modification.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep OpenClaw off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-66421
- https://github.com/theopaid/Stored-Cross-Site-Scripting-Via-Agent-Messages-Leading-To-Session-Token-Theft-openclaw-dashboard-
- https://www.vulncheck.com/advisories/openclaw-dashboard-stored-xss-via-lastmessage-session-field
- https://github.com/tugcantopaloglu/openclaw-dashboard
Read more
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