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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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.
of Lovable applications (170 out of 1,645) had exposed user data in the CVE-2025-48757 incident
Source: CVE-2025-48757 security advisory
of data breaches involve databases with misconfigured access controls
Source: Verizon Data Breach Investigations Report
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.”
Using PostgreSQL or MongoDB?
Regardless of which platform you choose, VAS scans for security issues specific to your stack.
Start Security ScanFrequently Asked Questions
Which database is more secure for multi-tenant apps?
PostgreSQL with RLS is significantly better for multi-tenancy. RLS policies ensure users can only access their own data at the database level. MongoDB requires application-level enforcement, which is more error-prone and has historically led to data breaches.
Is NoSQL injection as dangerous as SQL injection?
Yes, NoSQL injection can be equally dangerous. MongoDB queries accept JSON objects, so injection looks different ({$gt: ''}) but can still bypass authentication and leak data. Always validate input types and use ODMs like Mongoose that provide schema validation.
Why has MongoDB had more publicized breaches?
MongoDB's default configuration historically allowed unauthenticated access, and many developers deployed without changing defaults. The 2017-2020 ransomware attacks affected 47,000+ exposed databases. Modern MongoDB Atlas has better defaults, but legacy self-hosted instances remain at risk.