CVE-2026-65596: n8n: GraphQL Node Bypasses "Allowed HTTP Request Domains" Restriction

The GraphQL node did not enforce the “Allowed HTTP Request Domains” restriction on HTTP-based credentials (such as Header Auth, Basic Auth, Query Auth, and OAuth), unlike the HTTP Request node. An authenticated user able to create or edit workflows could therefore point the node’s endpoint at a server they control and exfiltrate restricted credentials.

Only instances where a credential has “Allowed HTTP Request Domains” configured and is usable by non-owner users are affected.