OAuth Vulnerability in n8n Workflow Automation Platform
CVE-2026-45732

8.3HIGH

Key Information:

Vendor

N8n-io

Status
N8n
Vendor
CVE Published:
23 June 2026

What is CVE-2026-45732?

An authorization bypass vulnerability exists in the n8n workflow automation platform, where the OAuth1 and OAuth2 credential reconnect endpoints were incorrectly configured. Before specific versions, these endpoints utilized 'credential:read' permissions, allowing authenticated users with limited access to initiate a reconnect flow that could overwrite sensitive token information. This flaw could allow attackers to gain unauthorized access to workflows reliant on affected credentials, leading to potential data exfiltration and persistent integration takeovers via external accounts. The issue has been resolved in the latest updates to n8n.

Affected Version(s)

n8n < 1.123.43 < 1.123.43

n8n >= 2.0.0-rc.0, < 2.20.7 < 2.0.0-rc.0, 2.20.7

n8n >= 2.21.0, < 2.21.1 < 2.21.0, 2.21.1

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-6h...
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CVSS V4

Score:
8.3
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.