Input validation error in n8n - #VU139102
Published: July 22, 2026
Vulnerability identifier: #VU139102
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/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 write arbitrary files.
The vulnerability exists due to improper input validation in the Edit Image node when processing a user-supplied output format value. A remote user can provide a crafted format value to write arbitrary files.
Exploitation requires the ability to run workflows.
Remediation
Install security update from vendor's website.