SAST vs DAST: Practical Differences

Security · Application Testing · Secure Development

This topic explores the practical differences between Static Application Security Testing (SAST) and Dynamic Application Security Testing (DAST) in modern software development workflows. Both approaches play an important role in identifying vulnerabilities, but they are most effective when used at different stages of the development and deployment lifecycle.

Key Highlights

• Integrated SAST into pull request workflows to detect vulnerabilities early during development.
• Scheduled DAST scans on staging environments as part of continuous security validation.
• Used critical severity gates to prevent high-risk issues from moving forward in the release cycle.
• Assigned clear ownership for remediation to improve accountability and response time.
• Reduced alert fatigue by deduplicating findings using CWE-based classification.

What I Learned

• How SAST and DAST complement each other in a secure SDLC workflow.
• The importance of shifting security earlier in the development lifecycle.
• How structured triage and ownership improve vulnerability management.
• How reducing duplicate findings helps teams focus on meaningful security issues.