CVE-2026-66421 (GCVE-0-2026-66421)
Vulnerability from cvelistv5 – Published: 2026-07-30 22:16 – Updated: 2026-09-24 14:18
VLAI
EPSS
VEX
Title
OpenClaw Dashboard Stored XSS via lastMessage Session Field
Summary
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.
Severity
9.3 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 15:07 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tugcantopaloglu/openclaw-dashboard | product |
| https://github.com/theopaid/Stored-Cross-Site-Scr… | vendor-advisory |
| https://www.vulncheck.com/advisories/openclaw-das… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tugcantopaloglu | openclaw-dashboard |
Affected:
1.1.0
(custom)
|
Date Public
2026-07-30 00:00
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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