Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n | n8n | < 1.123.27, 2.0.0-rc.0 – < 2.13.3, 2.14.0 – < 2.14.1, 2.14.0 – < 2.14.1, 2.0.0-rc.0 – < 2.13.3 | 1.123.27 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | n8n | < 1.123.27 | 1.123.27 | GHSA-3c7f-5hgj-h279 |
| npm | n8n | >= 2.14.0, < 2.14.1 | 2.14.1 | GHSA-3c7f-5hgj-h279 |
| npm | n8n | >= 2.0.0-rc.0, < 2.13.3 | 2.13.3 | GHSA-3c7f-5hgj-h279 |
Advisories 1
- WID-SEC-2026-0877 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 12, 2026
References
- GitHub Security Advisory (GHSA-3c7f-5hgj-h279) vendor-advisory
- VulnCheck Advisory: n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field third-party-advisory