---
title: "CVE-2026-110847: n8n - Stored XSS"
description: "n8n < 1.123.83, 2.x < 2.41.4, and 2.42.x < 2.42.1 contain a stored cross-site scripting caused by insufficient sanitization of customCss values in the Chat Trigger hosted-chat page, letting workflow authors publish malicious chat payloads executing on signed-in visitors' sessions, exploit requires published chat without user authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-110847/
---

# CVE-2026-110847 n8n - Stored XSS

n8n < 1.123.83, 2.x < 2.41.4, and 2.42.x < 2.42.1 contain a stored cross-site scripting caused by insufficient sanitization of customCss values in the Chat Trigger hosted-chat page, letting workflow authors publish malicious chat payloads executing on signed-in visitors' sessions, exploit requires published chat without user authentication.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-110847)

## Details

Type

Stored XSS

Impact

Stored XSS

CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to versions 1.123.83, 2.41.4, 2.42.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-110847](https://nvd.nist.gov/vuln/detail/CVE-2026-110847)
- [https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj](https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj)
- [https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter](https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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