Postgres
MongoDB

PostgreSQL vs MongoDB Security

PostgreSQL and MongoDB take different approaches to data security. PostgreSQL offers Row Level Security, while MongoDB relies on role-based access control.

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Security Comparison

Category
Postgres
MongoDB
Row-Level Security
Built-in RLS with policies
Field-level with rules (limited)
Connection Security
SSL/TLS, connection strings
SSL/TLS, connection strings
Query Security
SQL injection risk
NoSQL injection risk
Authentication
Multiple auth methods
SCRAM-SHA-256, X.509
Encryption
At-rest encryption available
At-rest encryption in Atlas
Audit Logging
pgAudit extension
Built-in audit logs in Atlas

The Verdict

PostgreSQL's RLS provides more granular row-level control, making it better suited for multi-tenant applications. MongoDB's flexibility can make security harder to reason about.

For applications needing row-level security (like those built with Supabase), PostgreSQL is the better choice. Use VAS to verify your security configuration regardless of database.

Industry Security Context

When comparing PostgreSQL vs MongoDB, consider these broader security trends.

10.3%

of Lovable applications (170 out of 1,645) had exposed user data in the CVE-2025-48757 incident

Source: CVE-2025-48757 security advisory

91%

of data breaches involve databases with misconfigured access controls

Source: Verizon Data Breach Investigations Report

4.45 million USD

average cost of a data breach in 2023

Source: IBM Cost of a Data Breach Report 2023

Vibe coding your way to a production codebase is clearly risky. Most of the work we do as software engineers involves evolving existing systems, where the quality and understandability of the underlying code is crucial.

Simon WillisonSecurity Researcher, Django Co-creator

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