Improper access control in n8n - #VU146791
Published: September 2, 2026
Vulnerability identifier: #VU146791
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to obtain a valid session.
The vulnerability exists due to improper access control in the public OIDC login and callback endpoints when handling OIDC authentication requests. A remote user can send requests to the endpoints to obtain a valid session.
The issue affects enterprise instances where OIDC was configured at least once and later disabled.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 1.123.76, 2.37.7, 2.38.2