PT-2026-66628 · Tugcantopaloglu · Openclaw-Dashboard

Theodosis Paidakis · CVE-2026-66421 · Published 2026-07-30 · Updated 2026-07-30

Mitre

CVSS v3.1

9.3

Critical

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-66421

Affected Products

Openclaw-Dashboard

References · 4

• https://github.com/theopaid/Stored-Cross-Site-Scripting-Via-Agent-Messages-Leading-To-Session-Token-Theft-openclaw-dashboard- · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-66421 · Security Note
• https://github.com/tugcantopaloglu/openclaw-dashboard · Note
• https://vulncheck.com/advisories/openclaw-dashboard-stored-xss-via-lastmessage-session-field · Note