Authorization bypass through user-controlled key in n8n - #VU150764
Published: September 17, 2026
Vulnerability identifier: #VU150764
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the credential test endpoint when resolving project-scoped workflow variables using a project ID supplied in the request body. A remote user can submit a credential test request specifying an arbitrary project and a controlled destination to disclose sensitive information.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 1.123.80, 2.39.6, 2.40.1