Stored Cross-Site Scripting Vulnerability in n8n Chat Trigger by n8n
CVE-2026-110847

7HIGH

Key Information:

Vendor

N8n-io

Status
N8n
Vendor
CVE Published:
14 October 2026

What is CVE-2026-110847?

A stored cross-site scripting vulnerability exists in n8n's Chat Trigger feature, allowing unauthorized workflow authors to execute custom scripts via insufficiently sanitized customCss values. This flaw can lead to unauthorized actions being performed on behalf of authenticated users, compromising their session security and potentially exposing sensitive information.

Affected Version(s)

n8n 0 < 1.123.83

n8n 2.0.0 < 2.41.4

n8n 2.42.0 < 2.42.1

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-x5...
vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-1.123.83-...
third-party-advisory

CVSS V4

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.