The Ultimate SaaS Security Checklist Before Launch

TL;DR: Before launching your SaaS, you must implement authentication, encryption, access controls, logging, dependency scanning, and incident response. Use this checklist to systematically close common vulnerabilities that cost startups millions.

Why a SaaS Security Checklist Matters

You've built your MVP with AI coding tools—Cursor, Bolt, Lovable—and you're ready to ship. But security can't be an afterthought. A single breach can destroy user trust and sink your startup. This saas security checklist covers the essentials every founder must address before going live.

1. Authentication & Authorization

Implement Strong Password Policies

Add Multi-Factor Authentication (MFA)

Use Role-Based Access Control (RBAC)

Code example (Node.js/Express):

// Example middleware for RBAC
function authorize(role) {
  return (req, res, next) => {
    if (req.user.role !== role) {
      return res.status(403).json({ error: 'Forbidden' });
    }
    next();
  };
}

2. Data Encryption

Encrypt Data in Transit

Encrypt Data at Rest

Example (using Node.js crypto):

const crypto = require('crypto');
const algorithm = 'aes-256-cbc';
const key = crypto.randomBytes(32);
const iv = crypto.randomBytes(16);

function encrypt(text) {
  let cipher = crypto.createCipheriv(algorithm, key, iv);
  let encrypted = cipher.update(text, 'utf8', 'hex');
  encrypted += cipher.final('hex');
  return { iv: iv.toString('hex'), encryptedData: encrypted };
}

3. Secure API Endpoints

Validate All Input

Implement Rate Limiting

Use API Keys for External Access

4. Dependency and Vulnerability Management

Scan Third-Party Packages

Keep Dependencies Updated

Action item: Run npm audit now. Fix any critical or high vulnerabilities.

5. Logging and Monitoring

Log Security Events

Set Up Alerts

6. Secure Configuration

Environment Variables

Disable Debug Mode

CORS Configuration

Example:

const cors = require('cors');
app.use(cors({
  origin: 'https://yourdomain.com',
  credentials: true
}));

7. Compliance and Legal

Privacy Policy and Terms of Service

GDPR / CCPA Readiness

SOC 2 / ISO 27001 (Future)

8. Incident Response Plan

Prepare a Runbook

Backup and Disaster Recovery

9. Run a Security Scan

Before launching, run a comprehensive scan. Tools like OverMCP can automatically audit your vibe-coded app for common misconfigurations, exposed secrets, and API vulnerabilities. It's built for makers who ship fast but can't afford to skip security.

10. Final Pre-Launch Checklist

FAQ

How often should I update my saas security checklist?

Review and update your checklist at least quarterly, or after any major feature release or dependency change. Security threats evolve fast.

What is the most common security mistake in SaaS startups?

Hardcoding API keys or database credentials in source code. Use environment variables or a secrets manager instead.

Do I need a penetration test before launch?

For early-stage SaaS, a penetration test is recommended but not mandatory. At minimum, run automated security scans and fix critical issues.