Input validation error in n8n - #VU139100
Published: July 22, 2026
Vulnerability identifier: #VU139100
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: n8n
Affected software:
n8n
n8n
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper input validation in the Edit Fields (Set) node when assigning output fields through dot-notation field names. A remote user can name a field after an inherited built-in method path to cause a denial of service.
The issue can corrupt a shared global in the main Node.js process, causing authenticated requests to fail until the process is restarted.
Remediation
Install security update from vendor's website.