Improper access control in n8n - CVE-2026-54304
Published: June 16, 2026
Vulnerability identifier: #VU134560
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-54304
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 disclose sensitive information.
The vulnerability exists due to improper access control in the SecurityScorecard node report download operation when handling a user-supplied URL. A remote user can configure an attacker-controlled URL to cause the SecurityScorecard API token to be sent to an external host and disclose sensitive information.
Exploitation requires permission to create or modify workflows and access to a SecurityScorecard credential with limited allowed domains.
How to mitigate CVE-2026-54304
Install security update from vendor's website.