Dynamic Application Security Testing (DAST) tools test your web application from the outside — making real HTTP requests, injecting attack payloads, and observing how the application responds — exactly the way an attacker would. Unlike SAST tools that analyze source code, DAST tools work against a running application and can detect vulnerabilities that only appear at runtime: misconfigurations, authentication weaknesses, business logic flaws, and server-side behaviors that no amount of code reading would reveal.
This guide covers the best DAST tools in 2026: how they work, what they find, and which tool is right for your use case.
What Is Dynamic Application Security Testing?
Dynamic Application Security Testing is the practice of testing a live, running web application or API for security vulnerabilities. The DAST tool acts as an automated attacker:
- Crawls the application — discovers pages, endpoints, forms, and API routes
- Fuzzes inputs — injects attack payloads into every parameter: SQL injection strings, XSS payloads, path traversal sequences, SSRF URLs, and format string attacks
- Analyzes responses — looks for error messages, timing differences, unexpected redirects, and data leakage that indicate a successful injection
- Checks configuration — verifies security headers, TLS configuration, cookie flags, CORS policies, and other server-side settings
The result is a list of confirmed or likely vulnerabilities in the running application — not theoretical issues in source code, but things the tool actually triggered.
DAST vs SAST: Complementary, Not Competing
A common misconception is that DAST and SAST find the same things. They don’t — they have different visibility and different strengths:
| Capability | DAST | SAST |
|---|---|---|
| Finds runtime configuration issues | ✅ | ❌ |
| Finds business logic flaws | ✅ (partially) | ❌ |
| Tests authentication and session management | ✅ | ❌ |
| Finds injection without access to source code | ✅ | ❌ |
| Works on third-party / compiled code | ✅ | ❌ |
| Finds hardcoded secrets | ❌ | ✅ |
| Finds taint-flow injection chains | ❌ | ✅ |
| Runs before the app is deployed | ❌ | ✅ |
| No false positives (confirmed findings) | ✅ | ❌ |
The best security programs run both. SAST catches injection flaws, hardcoded credentials, and insecure code patterns during development. DAST validates the running application’s actual behavior — including things that change at deploy time, like environment configuration, TLS setup, and authentication middleware.
What DAST Tools Find
A comprehensive DAST scan against an authenticated web application should find:
Injection Vulnerabilities
- SQL Injection — both error-based (application reveals SQL errors) and blind (timing-based or boolean-based, no error message)
- Command Injection — user input that reaches OS command execution
- Server-Side Template Injection (SSTI) — malicious expressions evaluated by template engines
- XML External Entity (XXE) — XML endpoints that resolve external entity references
- LDAP Injection — user input embedded in directory queries
Cross-Site Scripting (XSS)
- Reflected XSS — injection in query parameters, form fields, headers
- Stored XSS — persisted payloads that execute when viewed by other users (requires authenticated scanning and full application crawl)
- DOM-based XSS — client-side sinks that process URL fragments or storage values
Authentication and Session Issues
- Weak password policy — login accepts short or dictionary passwords
- Missing account lockout — brute force attack not blocked
- Session fixation — session token not rotated after login
- Session not invalidated on logout — old tokens remain valid
- JWT vulnerabilities —
alg: none, weak secret, missing signature validation - OAuth misconfiguration — missing state parameter, open redirects in redirect_uri
Server-Side Request Forgery (SSRF)
- URL parameters that cause the server to fetch external URLs
- Blind SSRF — server makes internal requests to infrastructure (metadata APIs, internal services) without visible response
Security Misconfiguration
- Missing security headers — no CSP, HSTS, X-Content-Type-Options, X-Frame-Options
- Information disclosure — server version headers, stack traces in error responses, verbose error messages
- Directory listing — web server returns file listings for open directories
- Debug endpoints —
/actuator,/.env,/debug,/adminexposed without authentication - CORS misconfiguration — wildcard origin with credentials, or overly permissive allowlists
- TLS issues — weak cipher suites, TLS 1.0/1.1 enabled, certificate problems
Path Traversal and File Inclusion
- Path traversal — file parameters that accept
../sequences - Arbitrary file read — application reads and returns server files based on user input
Top DAST Tools in 2026
1. Offensive360 DAST
Offensive360’s DAST scanner is a full dynamic application security testing platform built for enterprise use, available as part of the unified Offensive360 SAST + DAST + SCA platform.
Key capabilities:
- Full authenticated scanning — supports cookie-based auth, Bearer tokens, Basic auth, NTLM, form-based login with session maintenance
- Deep crawler for both server-rendered applications (HTML forms) and modern SPA/API architectures (REST, GraphQL)
- Comprehensive vulnerability detection: SQLi (error-based, time-based, blind), XSS, SSRF, SSTI, XXE, path traversal, CORS misconfiguration, security header analysis, TLS configuration
- Business logic testing support — configurable scan sequences for authenticated workflows
- CI/CD integration — GitHub Actions, GitLab CI, Jenkins, Azure DevOps, CircleCI
- On-premise deployment — the scanner runs inside your network, never needing external access to your application
- Findings unified with SAST results — same dashboard, same severity scale, same remediation guidance for code-level and runtime issues
- Correlated SAST+DAST findings — when both scanners find the same vulnerability, findings are linked to reduce noise and provide both source-level and runtime confirmation
Pricing: Included in the Offensive360 platform license (flat rate, no per-scan fees). One-time DAST scan available.
Best for: Enterprise teams wanting SAST and DAST in a single platform, on-premise or air-gapped deployments, and unified reporting across code and runtime.
2. OWASP ZAP (Zed Attack Proxy)
ZAP is the most widely used open-source DAST tool, maintained by the OWASP Foundation. It’s a proxy-based scanner that intercepts browser traffic and can perform both manual and automated scanning.
What ZAP does well:
- Free and open source — zero cost to get started
- Active and passive scanning modes
- API scanning via OpenAPI/Swagger import
- Automation Framework for CI/CD integration
- Large community and extensive documentation
Limitations:
- Requires significant configuration to scan complex authenticated applications
- Scan speed is slower than commercial alternatives
- False-positive rate can be high without tuning
- No built-in correlation with source code findings (SAST)
- Authentication handling for modern SPA applications (JWT, OAuth, token refresh) requires scripted configuration
Best for: Open-source projects, individual developers, and teams starting out with DAST on a budget.
3. Burp Suite Professional
Burp Suite by PortSwigger is the industry-standard tool for manual web application security testing. It includes an automated scanner (Burp Scanner) in the Professional tier.
What Burp does well:
- The most capable manual testing proxy available — indispensable for penetration testers
- Burp Scanner finds a wide range of vulnerabilities with high accuracy
- BApp Store extensions add functionality for JWT testing, GraphQL, OAuth, and more
- Excellent for learning — PortSwigger Web Security Academy is free
Limitations:
- Professional license ($499/year) is per-person, costs scale with team size
- Designed for manual use — CI/CD automation requires Burp Enterprise (significant additional cost)
- No on-premise server deployment for automated scanning (Burp Enterprise is SaaS)
- No integration with SAST findings
Pricing: Burp Suite Pro: $499/user/year. Burp Enterprise: contact for pricing ($8,000+/year for automated scanning).
Best for: Penetration testers and security engineers performing manual assessments.
4. Veracode Dynamic Analysis
Veracode’s DAST component is part of the Veracode application security platform, which also includes SAST and SCA.
What it offers:
- SaaS-based automated DAST
- Coverage for OWASP Top 10 and PCI-DSS scanning profiles
- Integration with Veracode’s SAST findings
Limitations:
- SaaS only — the scanner must reach your application from Veracode’s cloud; internal/air-gapped applications require Veracode’s agent configuration
- Per-seat pricing model
- DAST is significantly weaker than the SAST component for which Veracode is better known
Pricing: Typically bundled with Veracode’s platform ($30,000–$150,000+/year).
5. HCL AppScan (formerly IBM AppScan)
HCL AppScan is a legacy DAST + SAST platform that has been through several ownership changes (IBM → HCL). It has both desktop (AppScan Standard) and server-based (AppScan Enterprise) editions.
What it offers:
- Good DAST coverage for traditional web applications
- On-premise deployment option
- Integration with CI/CD pipelines
Limitations:
- Aging UI and slower development pace post-HCL acquisition
- Weaker support for modern API-heavy and SPA architectures compared to newer tools
- High cost relative to capabilities
Pricing: Enterprise pricing only, typically $20,000–$80,000+/year.
6. Checkmarx DAST (formerly Checkmarx Dynamic)
Checkmarx has added DAST capability to its platform, but it remains primarily known for SAST. The DAST component is available as an add-on.
Limitations:
- DAST is not a core strength — the primary product is SAST
- SAST and DAST are separate purchases without the unified experience of a purpose-built platform
Choosing the Right DAST Tool
| Requirement | Recommended Tool |
|---|---|
| SAST + DAST in one platform | Offensive360 |
| On-premise / air-gapped deployment | Offensive360 |
| Free / open source | OWASP ZAP |
| Manual penetration testing proxy | Burp Suite Professional |
| Large enterprise with existing Veracode SAST | Veracode Dynamic Analysis |
| CI/CD automated scanning, no manual testing | Offensive360 or Burp Enterprise |
How to Integrate DAST into CI/CD
The most effective DAST programs run automated scans in the CI/CD pipeline — not just on-demand. Here’s how to structure DAST in a DevSecOps pipeline:
Stage 1: Lightweight Pre-Deployment Scan (Pull Request)
Run a fast DAST scan against a staging deployment on every pull request. Scope it to the endpoints changed in the PR. This provides early feedback before code reaches the main branch.
# GitHub Actions example
name: DAST Scan on PR
on:
pull_request:
branches: [main]
jobs:
dast-scan:
runs-on: ubuntu-latest
steps:
- name: Deploy to staging
run: ./deploy-staging.sh
- name: Run DAST scan
env:
O360_API_KEY: ${{ secrets.O360_API_KEY }}
run: |
curl -X POST https://api.offensive360.com/scan/dast \
-H "X-API-Key: $O360_API_KEY" \
-d '{
"target": "https://staging.yourapp.com",
"auth": {
"type": "bearer",
"token": "${{ secrets.STAGING_API_TOKEN }}"
},
"scope": "changed-endpoints",
"severity_threshold": "high"
}'Stage 2: Full Authenticated Scan (Release Gate)
Run a full, depth-first DAST scan against a complete staging environment as part of your release pipeline. This catches vulnerabilities that weren’t introduced in this specific PR but exist in the application.
Stage 3: Scheduled Production Scan
Run periodic authenticated scans against a production-equivalent environment (or production itself, with a read-only scan profile) to detect configuration drift and newly discovered vulnerability patterns.
Authenticated DAST: Why It Matters
Unauthenticated DAST scans test only the public surface of your application — login pages, marketing content, and public APIs. The majority of application functionality — and the majority of security-sensitive code — lives behind authentication.
A properly authenticated DAST scan can test:
- User account management endpoints
- Payment flows and financial operations
- Admin interfaces
- Data export endpoints
- API endpoints requiring Bearer tokens
To configure authenticated scanning, you need to provide the scanner with:
- Login credentials — username, password, and the login form URL
- Session maintenance — how to detect when the session has expired and re-authenticate
- Scope — which authenticated paths are in-scope for testing
- Exclusions — paths that should not be tested (e.g., logout, delete account, send bulk email)
Most enterprise DAST tools support multiple authentication mechanisms: form-based login, Bearer token, API key header, Basic auth, and OAuth 2.0 client credentials.
DAST Scan Checklist
Use this to verify your DAST setup is comprehensive before relying on it for security coverage:
Authentication:
- Scan uses valid authenticated credentials
- Session is maintained throughout the scan (re-authentication configured)
- Admin and privileged user roles scanned separately
- API endpoints require auth and are tested with valid tokens
Scope:
- All application paths included in the crawl scope
- GraphQL introspection queried and all operations tested
- File upload endpoints included and tested with malicious files
- WebSocket endpoints included if applicable
- Excluded paths configured (logout, bulk send, destructive operations)
Coverage verification:
- Scan log shows successful crawl of authenticated pages
- Request count is proportional to application size (too few = shallow crawl)
- Headers, cookies, and JSON body parameters all tested
- Both GET and POST parameters fuzzed
Findings review:
- Critical/High findings reviewed before dismissing as false positives
- Each finding includes a request/response proving exploitability
- Remediation guidance reviewed and assigned to developers
Frequently Asked Questions
What is the difference between DAST and SAST?
SAST (Static Application Security Testing) analyzes source code without running the application. DAST tests a running application by sending real HTTP requests. SAST finds code-level issues like hardcoded secrets, injection in source, and insecure APIs. DAST finds runtime issues like authentication weaknesses, configuration problems, and vulnerabilities that only appear when the application is actually running. Both are needed for comprehensive coverage — see our SAST vs DAST comparison for a full breakdown.
Can DAST replace penetration testing?
DAST automates the discovery of common, well-understood vulnerability classes efficiently and repeatably. Penetration testing adds human judgment, creativity, and the ability to chain vulnerabilities into complex exploits. For most organizations, automated DAST in CI/CD covers 70–80% of exploitable vulnerabilities at a fraction of the cost of annual pentests — and pentests are still recommended annually to catch the logic flaws and chained exploits that scanners miss.
Does DAST work on APIs?
Yes. Modern DAST tools — including Offensive360 — support REST API scanning via OpenAPI/Swagger specification import or crawl-based discovery, GraphQL endpoint scanning, and API authentication (Bearer tokens, API keys, OAuth). API-only DAST scans are increasingly important as applications shift to decoupled frontend/backend architectures where the “application” is an API, not an HTML page.
How long does a DAST scan take?
Scan time depends on application size (number of endpoints, parameters, and crawl depth) and scan configuration. A lightweight scan of a small application might complete in 20 minutes. A full authenticated scan of a large enterprise application with thousands of endpoints can take 8–24 hours. Most CI/CD pipelines use incremental or scoped scans for speed, with full scans scheduled outside of peak hours.
Can DAST scan mobile app backends?
Yes. If your mobile app communicates with a REST or GraphQL API, that API can be scanned with DAST. The scanner doesn’t care whether requests come from a browser or a mobile app — it tests the API endpoints directly. Provide the scanner with the API base URL, authentication tokens, and an OpenAPI specification if available.
Get Started with DAST
Running a DAST scan is the fastest way to discover what an attacker sees when they probe your application from the outside.
- One-time DAST scan — authenticated dynamic scan of your web application, results within 48 hours
- DAST product page — full feature list, language and framework coverage, and CI/CD integrations
- Book a demo — see Offensive360’s DAST scanner against OWASP Juice Shop or your own application
Combining SAST and DAST in the same platform gives you complete application security coverage: code-level vulnerabilities found before deployment, runtime behavior validated after deployment — unified in a single dashboard.