What’s Vulnerable › Vulnerabilities
CVE-2026-42227: n8n: Public API Variables IDOR Allows Cross-Project Secret Disclosure
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% 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-639
Description
n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an authenticated user with a valid API key scoped to variable:list could read variables from projects they are not a member of by supplying an arbitrary projectId query parameter to the public API variables endpoint. The handler queried the variables repository directly without enforcing project membership checks, bypassing the authorization-aware service layer used by the internal enterprise controller. If variables were misused to store sensitive information such as credentials or tokens, they should be rotated immediately. This issue only affects licensed enterprise or team deployments with multiple projects and the variables feature enabled. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.
Affected products
- n8n-io n8n: before 1.123.32; from 2.17.0 before 2.17.4; 2.18.0 — fixed in 1.123.32, 2.17.4
How to fix
Upgrade to a fixed version: n8n-io n8n 1.123.32, 2.17.4. Check the vendor advisory for mitigations.
References
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