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Database Security

Is PostgreSQL Secure? Security Features, Risks, and Hardening

Yes, PostgreSQL is generally secure when configured correctly. Here is what you need to know about its built-in protections, common vulnerabilities, and how to harden it for production.

Built-in Security Features

Role-based access control with granular object privileges
Row-Level Security (RLS) for fine-grained data access
SSL/TLS encryption for client-server communication
Built-in password authentication with SCRAM-SHA-256
Audit logging capabilities through pgaudit extension

Common Vulnerabilities

Default trust authentication in pg_hba.conf allowing local access
SQL injection through application-layer dynamic queries
Unencrypted connections exposing data in transit
Excessive privileges granted to application database users
Exposed PostgreSQL port (5432) to the public internet

Hardening Checklist

1Configure pg_hba.conf with scram-sha-256 authentication, never trust
2Enable SSL/TLS and require encrypted connections
3Create application-specific database roles with minimum privileges
4Use Row-Level Security policies for multi-tenant data isolation
5Restrict listening addresses and use firewall rules on port 5432
6Install and configure pgaudit for comprehensive audit logging
7Disable superuser access for application connections
8Enable connection pooling with PgBouncer for connection management
9Encrypt data at rest using full-disk encryption or TDE
10Regularly update PostgreSQL to latest stable release

Read the complete PostgreSQL security guide

In-depth blog post with code examples and best practices

Official PostgreSQL security documentation

Frequently Asked Questions

Is PostgreSQL secure?

Yes, PostgreSQL is generally secure when configured correctly. It includes built-in protections like role-based access control with granular object privileges. However, common misconfigurations and development patterns can introduce vulnerabilities.

What are the main security risks with PostgreSQL?

The most common PostgreSQL security risks include default trust authentication in pg_hba.conf allowing local access, sql injection through application-layer dynamic queries, unencrypted connections exposing data in transit.

How do I harden PostgreSQL for production?

Key hardening steps: Configure pg_hba.conf with scram-sha-256 authentication, never trust. Enable SSL/TLS and require encrypted connections. Create application-specific database roles with minimum privileges. Run a security check on your domain to identify specific issues.

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