What’s Vulnerable › Vulnerabilities
CVE-2026-45732: n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-23 · updated 2026-10-26
- Weakness: CWE-639
Description
n8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, the OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate an OAuth reconnect flow and overwrite the stored token material for that credential with tokens bound to an external account they control. Workflows relying on the affected credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations. This vulnerability is fixed in 1.123.43, 2.22.1, and 2.20.7.
Affected products
- n8n-io n8n: before 1.123.43; from 2.0.0 before 2.20.7; from 2.21.0 before 2.22.1 — fixed in 1.123.43, 2.20.7, 2.22.1
How to fix
Upgrade to a fixed version: n8n-io n8n 1.123.43, 2.20.7, 2.22.1. Check the vendor advisory for mitigations.
References
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