Authorization bypass through user-controlled key in n8n - #VU127223
Published: April 23, 2026
Vulnerability identifier: #VU127223
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-639
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 disclose sensitive information.
The vulnerability exists due to authorization bypass through a user-controlled key in the public API variables endpoint when handling requests with an arbitrary projectId query parameter. A remote user can supply a crafted projectId value to disclose sensitive information.
Only licensed enterprise or team deployments with multiple projects and the variables feature enabled are vulnerable.
Remediation
Install security update from vendor's website.