Security for Vibe-Coded SaaS Applications
SaaS apps handle multiple customers' data on shared infrastructure. When built with AI coding tools, the default code often lacks proper tenant isolation, making data leaks between customers a real risk.
Get security coverage specific to your use case.
Why Security Matters for SaaS Applications
SaaS applications are high-value targets because they aggregate data from many customers. A single vulnerability can expose every customer's data simultaneously. Vibe-coded SaaS apps are particularly risky because AI tools generate code that works functionally but rarely implements proper data isolation. Row Level Security policies, tenant-scoped queries, and API authorization checks are almost never generated correctly by default. A breach in a SaaS product doesn't just affect you — it affects every customer. This creates legal liability, destroys trust, and can end your business overnight.
Security Risks
Cross-tenant data leakage
criticalWithout proper RLS or tenant-scoped queries, one customer can access another customer's data through the API.
Mitigation
Implement Row Level Security on every table. Add tenant_id to all queries and enforce it at the database level, not just the application level.
Broken authentication escalation
criticalAI-generated auth code often lacks role checks, allowing regular users to access admin endpoints or other tenants' resources.
Mitigation
Implement middleware that checks both authentication AND authorization on every API route. Use role-based access control with tenant context.
API key exposure in client bundles
highService-level API keys embedded in frontend code give attackers direct database access bypassing all application-level controls.
Mitigation
Keep service keys server-side only. Use Supabase anon keys with RLS or Firebase client SDKs with Security Rules for client-side operations.
Insufficient logging and monitoring
mediumWithout audit logs, you can't detect unauthorized access or investigate breaches. Most vibe-coded apps have zero logging.
Mitigation
Add structured logging for all authentication events, data access, and admin actions. Set up alerts for anomalous patterns.
Security Checklist
Every database table must have RLS policies that scope data to the authenticated tenant.
No API endpoint should be accessible without a valid session token.
Separate admin, member, and viewer roles with enforced permission boundaries.
CSP, HSTS, X-Frame-Options, and other security headers on all responses.
Prevent brute force attacks on login and signup flows.
Track who accessed what data and when for compliance and incident response.
Regular scans to catch configuration drift and new vulnerabilities.
Professional security review of critical flows like payments and admin access.
Real-World Scenario
A developer builds a project management SaaS using Lovable. The app works great — users can create projects, invite team members, and track tasks. But the AI-generated Supabase queries don't include tenant filtering. A curious user modifies a frontend API call, changing the project ID to one belonging to another company. The API returns the data because there are no RLS policies. Within hours, the user has scraped project data from dozens of other companies. The developer only discovers the breach when a customer complains about seeing someone else's data. By then, sensitive project details including client names, budgets, and internal notes have been exposed.
Frequently Asked Questions
What's the biggest security risk for vibe-coded SaaS apps?
Cross-tenant data leakage. AI tools almost never generate proper data isolation between customers. Without Row Level Security or tenant-scoped queries, any authenticated user can potentially access other customers' data.
Do I need SOC 2 compliance for my SaaS?
If you're selling to businesses, many will require SOC 2 or similar compliance. Even if not legally required, implementing the security controls in a SOC 2 framework significantly reduces your risk of a breach.
How do I test for tenant isolation issues?
Create two test accounts in different tenants. Log in as User A and try to access User B's resources by modifying API calls, changing IDs in URLs, and testing direct database queries. VAS can automate many of these checks.
Security for Other Use Cases
Secure Your SaaS Applications
VAS automatically scans for the security risks specific to saas applications. Get actionable results with step-by-step fixes tailored to your stack.
Scans from $5, results in minutes.