Improper Authorization in n8n - #VU140998
Published: August 5, 2026
Vulnerability identifier: #VU140998
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to escalate privileges.
The vulnerability exists due to improper access control in the custom-role deletion reassignment path when handling role deletion requests with a reassignment target. A remote user can delete a custom project role and reassign its holders to the built-in project:admin role to escalate privileges.
Exploitation requires the global role:manageProject scope.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 2.33.4, 2.34.1