Improper access control in n8n - #VU137165
Published: July 8, 2026
Vulnerability identifier: #VU137165
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-284
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 escalate privileges.
The vulnerability exists due to improper access control in the Token Exchange module when issuing access tokens from externally trusted JWTs. A remote user can obtain a token exchange JWT and invoke administrator-only Public API operations to escalate privileges.
Only instances with the Token Exchange feature and the Public API enabled are vulnerable. Exploitation requires access to an external JWT accepted by a configured trusted key. Role escalation additionally requires an Advanced Permissions license.
Remediation
Install security update from vendor's website.