Improper privilege management in n8n - #VU137158
Published: July 8, 2026
Vulnerability identifier: #VU137158
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-269
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 Enterprise SSO instance-role provisioning feature when processing an Identity Provider role claim during authentication. A remote user can supply or influence an instance-role claim that resolves to the global:owner role to escalate privileges.
Only instances with Enterprise SSO configured and instance-role provisioning enabled via the N8N_SSO_SCOPES_PROVISION_INSTANCE_ROLE flag are vulnerable. Exploitation additionally requires control over the issued instance-role claim or its claim-to-role mapping.
Remediation
Install security update from vendor's website.