What’s Vulnerable › Vulnerabilities
CVE-2026-42226: n8n: Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-04 · updated 2026-06-17
- Weakness: CWE-862
Description
n8n is an open source workflow automation platform. Prior to versions 1.123.33 and 2.17.5, the dynamic-node-parameters endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key. The issue is not limited to any single node type; any node that resolves credentials dynamically through these endpoints may be affected. This issue has been patched in versions 1.123.33, 2.17.5, and 2.18.0.
Affected products
- n8n-io n8n: before 1.123.33; from 2.17.0 before 2.17.5 — fixed in 1.123.33, 2.17.5
How to fix
Upgrade to a fixed version: n8n-io n8n 1.123.33, 2.17.5. Check the vendor advisory for mitigations.
References
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