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Exploits
ID:12290 - Exploit for Arbitrary file upload in n8n - CVE-2026-21877
ID:12290 - Exploit for Arbitrary file upload in n8n - CVE-2026-21877
Published: January 9, 2026
Vulnerability identifier: #VU121066
Vulnerability risk: Medium
CVE-ID: CVE-2026-21877
CWE-ID: CWE-434
Exploitation vector: Remote access
Vulnerable software:
n8n
n8n
Link to public exploit:
Vulnerability description
The vulnerability allows a remote user to compromise vulnerable system.
The vulnerability exists due to insufficient validation of file during file upload. A remote user can upload a malicious file and execute it on the server.
Remediation
Install updates from vendor's website.