CVE-2026-56356

Name of the Vulnerable Software and Affected Versions n8n versions prior to 1.123.27 n8n versions 2.0.0 through 2.13.2 n8n version 2.14.0

Description A stored cross-site scripting issue exists in the Chat Trigger node's Custom CSS field caused by a misconfiguration of the sanitize-html library. An authenticated user with permissions to create or modify workflows can inject JavaScript that bypasses sanitization. This allows the execution of malicious scripts against any user who visits the public chat page.

Recommendations Update to version 1.123.27 or later. Update to version 2.13.3 or later. Update to version 2.14.1 or later.