Improper Certificate Validation in n8n - CVE-2026-33724
Published: April 30, 2026
Vulnerability identifier: #VU128726
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33724
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: n8n
Affected software:
n8n
n8n
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information and modify workflow content.
The vulnerability exists due to improper certificate validation in the SSH command used for git operations when connecting to a remote Git server over SSH for Source Control operations. A remote attacker can present a fraudulent host key in a machine-in-the-middle position to disclose sensitive information and modify workflow content.
Only instances with the Source Control feature explicitly enabled and configured to use SSH are vulnerable.
How to mitigate CVE-2026-33724
Install security update from vendor's website.