Four security problems that emerge when you move a SQL client to a server

Running a database client on a server eliminates the need for per-user VPN access and scattered credentials, but it transforms the tool into a multi-tenant network service with new security challenges. The developers of LibreDB Studio encountered all four problems firsthand, getting two of them wrong initially. A key issue is that middleware session checks act as a convenience layer, not a true security boundary, so every sensitive route must independently verify the caller. Non-human callers like agent runtimes cannot present session cookies, requiring short-lived, narrowly scoped tokens derived from — but cryptographically separate from — the main JWT secret. Browser-based clients also introduce risks from ambient authority, making origin validation and strict CSRF protections necessary additions beyond standard session cookies.