PostgreSQL is a robust and trusted database platform, but it’s not invincible. The PostgreSQL Global Development Group “takes security seriously,” enabling users to trust it with mission-critical data (PostgreSQL: Security Information). However, simply running PostgreSQL with default settings or careless practices can be like leaving your solid steel front door unlocked or even opened. You have the protection mechanisms, you just aren’t using them.
A very common concern is that security vulnerabilities can creep in through mistakes in how we write queries, configure the server, or especially how we manage user privileges. In fact, the PostgreSQL documentation itself emphasizes that