Incorrect Authorization Affecting n8n package, versions <2.6.4>=2.7.0 <2.7.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 Mar 2026
- disclosed25 Mar 2026
- creditsubhan umer
Introduced: 25 Mar 2026
NewCVE-2026-33720 (opens in a new tab)How to fix?
Upgrade n8n to version 2.6.4, 2.7.3 or higher.
Overview
n8n is a n8n Workflow Automation Tool
Affected versions of this package are vulnerable to Incorrect Authorization in the OAuth callback when the N8N_SKIP_AUTH_ON_OAUTH_CALLBACK environment variable is set to true. An attacker can gain unauthorized access to OAuth tokens by tricking a victim into completing an OAuth flow against a credential object controlled by the attacker, allowing the attacker to execute workflows as the victim.
Workaround
This vulnerability can be mitigated by avoiding enabling N8N_SKIP_AUTH_ON_OAUTH_CALLBACK=true unless strictly required and restricting access to fully trusted users only.