Stored cross-site scripting in n8n - CVE-2026-27578
Published: March 13, 2026
Vulnerability identifier: #VU124006
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-27578
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: n8n
Affected software:
n8n
n8n
Detailed vulnerability description
The disclosed vulnerability allows a remote user to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote user can inject arbitrary scripts into pages rendered by the n8n application using different techniques on various nodes execute arbitrary JavaScript code in user's browser in context of vulnerable website.
How to mitigate CVE-2026-27578
Install updates from vendor's website.