Improper access control in n8n - #VU134563
Published: June 16, 2026
Vulnerability identifier: #VU134563
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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 trigger workflow execution and cause unintended side effects in downstream systems.
The vulnerability exists due to improper access control in the POST /workflows/{workflowId}/test-runs/new endpoint when handling requests to create evaluation test runs. A remote user can send a request to create a new test run for a workflow with read-only access to trigger workflow execution and cause unintended side effects in downstream systems.
Only instances using the Evaluations feature are affected.
Remediation
Install security update from vendor's website.