SEPTEMBER 17, 2026
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Case File

CVE-2026-66421

CRITICAL · CVSS 9.3 EPSS 0.47% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-30 · Last synced 2026-08-29

CyberRota Analysis

AI-Generated

The OpenClaw Dashboard in Java is vulnerable to a stored cross-site scripting (XSS) attack, enabling unauthenticated remote attackers to execute arbitrary JavaScript in the administrator's browser session. This vulnerability allows attackers to inject malicious HTML into session transcripts, potentially leading to session token theft and unauthorized access to administrative functions. Organizations using OpenClaw should prioritize patching this critical vulnerability to safeguard against potential exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-66421
Severity
CRITICAL
CVSS
9.3
EPSS
0.47%
Java

Original 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.