CVE-2026-110847
n8n before 1.123.83, 2.41.4, and 2.42.1 Stored XSS via Chat Trigger customCss Parameter
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a stored cross-site scripting vulnerability in the Chat Trigger hosted-chat page, where insufficiently sanitised customCss values are interpolated into the page as markup. Workflow authors can publish a chat without n8n user authentication whose payload executes on the instance origin, acting on the sessions of signed-in visitors.
| CWE | CWE-79 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Oct 14, 2026 |
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Affected Versions
n8n-io / n8n
0 < 1.123.83 2.0.0 < 2.41.4 2.42.0 < 2.42.1