SB2026010769 - Arbitrary file upload in n8n
Published: January 7, 2026 Updated: January 9, 2026
Security Bulletin ID
SB2026010769
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Arbitrary file upload (CVE-ID: CVE-2026-21877)
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 update from vendor's website.