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CVE-2026-110847 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/n8n-io/n8n/security/advisories/GHSA-x5cw-hm7v-q7mj	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-stored-xss-via-chat-trigger-customcss-parameter	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
n8n	< 1.123.83 (semver) < 2.41.4 (semver) < 2.42.1 (semver)
CPE cpe:2.3:a:n8n:n8n::::::node.js::* Remediation Upgrade: >= 1.123.83moderate effort Upgrade: >= 2.41.4moderate effort Upgrade: >= 2.42.1moderate effort Mitigation:low effort Restrict n8n instance access to fully trusted users only. Mitigation:low effort Audit active Chat Trigger workflows and review the customCss parameter for unexpected values. Mitigation:low effort Enable authentication on Chat Trigger nodes to prevent anonymous visitors from reaching the hosted-chat page. Mitigation:low effort Deactivate Chat Trigger workflows that are not currently required until the instance is patched.

Product

Versions

n8n

< 1.123.83 (semver)

< 2.41.4 (semver)

< 2.42.1 (semver)

CPE

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*

Remediation

Upgrade: >= 1.123.83moderate effort
Upgrade: >= 2.41.4moderate effort
Upgrade: >= 2.42.1moderate effort
Mitigation:low effort
Restrict n8n instance access to fully trusted users only.
Mitigation:low effort
Audit active Chat Trigger workflows and review the customCss parameter for unexpected values.
Mitigation:low effort
Enable authentication on Chat Trigger nodes to prevent anonymous visitors from reaching the hosted-chat page.
Mitigation:low effort
Deactivate Chat Trigger workflows that are not currently required until the instance is patched.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 15, 2026	CVE Modified	CISA-ADP
Oct 14, 2026	New CVE Received	[email protected]