CVE-2026-110847

High

Description

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.

SeverityHigh

CVSS7.0

Exploit probability—

ProductN8n

PublishedOct 14, 2026

First seenOct 14, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

n8n-io n8n1.123.83, 2.41.4, 2.42.1 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj

Affected products

Product	Affected versions	Fixed in
n8n-io n8n	v < 1.123.83, 2.0.0 ≤ v < 2.41.4, 2.42.0 ≤ v < 2.42.1	1.123.83, 2.41.4, 2.42.1

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