Authorization bypass through user-controlled key in n8n - CVE-2026-33663
Published: April 23, 2026
Vulnerability identifier: #VU127205
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-2026-33663
CWE-ID: CWE-639
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 authorization bypass through user-controlled key in the credential resolution path and credentials permission checker when resolving and executing workflows with generic HTTP credentials. A remote user can resolve another user's credential ID and execute a workflow to disclose sensitive information.
This issue affects Community Edition only, and native integration credential types such as slackApi, openAiApi, and postgres are not affected.
How to mitigate CVE-2026-33663
Install security update from vendor's website.