PT-2026-54040 · N8N · N8N

Jorianwoltjer · Published 2026-06-30 · Updated 2026-06-30 · CVE-2026-56356

NVD

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-56356

Affected Products

N8N

References · 3

• https://github.com/n8n-io/n8n/security/advisories/GHSA-3c7f-5hgj-h279 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56356 · Security Note
• https://vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-chat-trigger-node-custom-css-field · Note