Authorization bypass through user-controlled key in n8n - CVE-2026-45732
Published: May 13, 2026
Vulnerability identifier: #VU131358
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45732
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 overwrite stored OAuth token material for a shared credential.
The vulnerability exists due to improper access control in the OAuth1 and OAuth2 credential reconnect endpoints when handling OAuth reconnect requests for shared credentials. A remote user can initiate an OAuth reconnect flow to overwrite stored OAuth token material for a shared credential.
This issue affects instances where credentials are shared with other users or across projects.
How to mitigate CVE-2026-45732
Install security update from vendor's website.