n8n is an open source workflow automation platform. Prior to 2.27.4 and 2.28.1, the AI Agents feature did not enforce the Allowed HTTP Request Domains restriction configured on credentials when an MCP tool was pointed at an arbitrary URL, allowing a member-level user with use-only access to a shared credential to send its secret to an external server they control. This issue is fixed in versions 2.27.4 and 2.28.1.
Fix
Patch, vendor advisory and mitigation references on NVD 1
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.1 · n8nNVD modified 2026-10-25 17:10
Affected (CPE criteria) 2
cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*cpe:2.3:a:n8n:n8n:2.28.0:*:*:*:*:node.js:*:*