---
id: CVE-2026-110847
title: >-
  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…
summary: >-
  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…
severity: high
cvss: 7
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-79
vendor: n8n-io
product: n8n
affected:
  - n8n < 1.123.83
  - n8n >= 2.0.0 < 2.41.4
  - n8n >= 2.42.0 < 2.42.1
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T14:17:21.007'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110847'
references:
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T13:42:55.565618Z'
cvssSource: cna
ingestedAt: '2026-10-15T00:02:07.177Z'
epss: 0.00367
epssPercentile: 0.3034
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.