CVE-2026-56356 n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field

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 authenticat...

Cross-site Scripting (XSS)

Overview @n8n/n8n-nodes-langchain is a Affected versions of this package are vulnerable to Cross-site Scripting XSS via the Custom CSS field in the Chat Trigger node due to improper sanitization in the sanitize-html library. An authenticated user with permission to create or modify workflows and...

FooGallery < 2.0.35 - Authenticated Stored Cross-Site Scripting

In the plugin, the Custom CSS field of each gallery is not properly sanitised or validated before being being output in the page where the gallery is embed, leading to a stored Cross-Site Scripting issue. PoC Create or edit a gallery and add the following payload in the Custom CSS field:...