CVE-2026-66421

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.

CVSS v3 9.3 CRITICAL

9.3^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.8 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/theopaid/Stored-Cross-Site-Scripting-Via-Agent-Messages-Leading-To-Session-Token-Theft-openclaw-dashboard-	Exploit Mitigation Third Party Advisory
https://github.com/tugcantopaloglu/openclaw-dashboard	Product
https://www.vulncheck.com/advisories/openclaw-dashboard-stored-xss-via-lastmessage-session-field	Exploit Third Party Advisory
https://github.com/theopaid/Stored-Cross-Site-Scripting-Via-Agent-Messages-Leading-To-Session-Token-Theft-openclaw-dashboard-	Exploit Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:tugcantopaloglu:openclaw_agent_dashboard:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-30 23:16

Updated : 2026-09-03 19:56

NVD link : CVE-2026-66421

Mitre link : CVE-2026-66421

CVE.ORG link : CVE-2026-66421

JSON object : View

Products Affected

tugcantopaloglu

openclaw_agent_dashboard

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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