Authorization Bypass Through User-Controlled Key Affecting n8n package, versions <1.123.43>=2.0.0-rc.0 <2.20.7-exp.0>=2.21.0 <2.21.1
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- published17 May 2026
- disclosed14 May 2026
- creditArtemiy, JJ
Introduced: 14 May 2026
NewCVE-2026-45732 (opens in a new tab)How to fix?
Upgrade n8n to version 1.123.43, 2.20.7-exp.0, 2.21.1 or higher.
Overview
n8n is a n8n Workflow Automation Tool
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the OAuth1 and OAuth2 credential reconnect endpoints. A user with readonly access to shared credentials can overwrite stored OAuth token material for the shared credentials by initiating a reconnect flow with an external account they control, causing workflows to execute under the attacker's OAuth identity and enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations.