BugBunny.ai • June 16, 2026 • 6 min read
SAST and DAST: How to Combine Static and Dynamic Testing
SAST sees code before it runs. DAST sees behavior after deployment. Neither one sees the whole security story alone.
Quick answer
SAST analyzes code or intermediate representations without execution. DAST tests a running application by sending requests and observing responses. The practical starting point is simple: Use SAST early for code patterns and DAST later for deployed behavior, then validate high-risk findings manually.
Primary risk
Teams treat SAST and DAST output as complete proof and miss authorization, business logic, configuration, and chained vulnerabilities.
Best for
application security teams building a balanced testing program
What it means in practice
SAST analyzes code or intermediate representations without execution. DAST tests a running application by sending requests and observing responses.
The operational test is whether a team can connect the concept to ownership, evidence, and a specific security boundary. For SAST and DAST, weak programs usually fail because the work is present in fragments: one tool knows the asset, another tool knows the owner, and a third tool knows the finding. Attackers do not respect those internal boundaries.
A stronger program makes the boundary explicit. It says which user, service, API, workload, dependency, control, or environment is protected; what would count as failure; and how the team will know before the issue becomes an incident or an audit finding.
Where teams get it wrong
SAST reports unreachable code paths while DAST misses routes that require complex authentication or state.
DAST catches symptoms but cannot show the vulnerable source or fix location.
Both tools miss tenant boundaries and workflow abuse without scenario design.
Findings are tracked separately, creating duplicate or conflicting remediation work.
What good looks like
The useful version of SAST and DAST is measurable. It creates fewer ambiguous findings, shortens the path from issue to owner, and gives engineering teams enough context to fix the weakness without reverse-engineering the report.
- SAST in pull requests for early feedback on high-confidence code issues.
- Authenticated DAST in staging or preview environments with realistic test accounts.
- Manual validation for critical findings, auth logic, and chained impact.
- Unified triage that deduplicates and assigns findings by service owner.
What to do this week
Tune SAST around your frameworks, helpers, sources, and sinks.
Give DAST seeded data and accounts for each important role.
Compare findings by route, file, and exploit path.
Add regression tests for confirmed SAST and DAST findings.
Use manual testing where both tool types lack context.
Where BugBunny helps
BugBunny.ai treats SAST and DAST as a validation problem, not only a documentation or tooling problem. The goal is to show which boundary can be crossed, what the attacker gains, and which remediation removes the path.
- Bridge SAST and DAST gaps with human-led exploit validation.
- Find issues that require source context and runtime behavior together.
- Prioritize findings by confirmed attacker outcome.
- Help teams reduce duplicate work across testing tools.
FAQ
What is SAST and DAST?
SAST analyzes code or intermediate representations without execution. DAST tests a running application by sending requests and observing responses.
What is the main risk with SAST and DAST?
Teams treat SAST and DAST output as complete proof and miss authorization, business logic, configuration, and chained vulnerabilities.
What should teams check first for SAST and DAST?
Use SAST early for code patterns and DAST later for deployed behavior, then validate high-risk findings manually.
Where does BugBunny.ai help with SAST and DAST?
Bridge SAST and DAST gaps with human-led exploit validation. Find issues that require source context and runtime behavior together. Prioritize findings by confirmed attacker outcome. Help teams reduce duplicate work across testing tools.