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April 20, 2026 8 min readSecurity Analysis

Web Application Security Checklist for 2026

Web Application Security Checklist for 2026

Securing a modern web application requires a multi-layered approach. Use this checklist to evaluate your current security posture.

Authentication & Authorization

  • [ ] Implement Multi-Factor Authentication (MFA).
  • [ ] Ensure secure password storage using bcrypt or Argon2.
  • [ ] Use JWTs securely (sign with a strong secret, set expiration).
  • [ ] Regularly audit user permissions.

Data Protection

  • [ ] Use TLS 1.3 for all communications.
  • [ ] Encrypt sensitive database fields at rest.
  • [ ] Implement proper Content Security Policy (CSP) headers.

Input Validation

  • [ ] Validate all user input on the server side.
  • [ ] Use parameterized queries for all database interactions.
  • [ ] Sanitize data before rendering it in the UI to prevent XSS.

Logging & Monitoring

  • [ ] Log all authentication attempts (success and failure).
  • [ ] Monitor for unusual traffic patterns.
  • [ ] Have a clear incident response plan.
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