Improper Authorization in n8n - #VU134556
Published: June 16, 2026
Vulnerability identifier: #VU134556
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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 modify evaluation test runs and cause a denial of service.
The vulnerability exists due to improper access control in evaluation test runs controller endpoints when handling state-changing requests. A remote user can send requests to start new evaluation test runs, cancel in-flight runs, or delete run records to modify evaluation test runs and cause a denial of service.
This issue only affects instances with Advanced Permissions where projects and viewer roles are in use.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 1.123.55, 2.25.7, 2.26.2