Vulnerability Details CVE-2026-56356
n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 8.0%
CVSS Severity
CVSS v3 Score 5.4