OpenClaw Dashboard — CVE-2026-66421 (Critical)

Date Jul 30, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product OpenClaw · Dashboard

CVE CVE-2026-66421

Critical vendor advisory CVE-2026-66421

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 unauthoriz

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 9.3) in OpenClaw Dashboard. Patch or mitigate promptly.

Operator check

Review CVE-2026-66421 in your asset inventory. Apply patches per vendor guidance and verify Dashboard is not exposed. CVSS score: 9.3.

Sources

NVD — CVE-2026-66421 Source reference Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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