TL;DR
- Legacy SAST tools shine at dependency CVEs and lint-style issues; they miss prompt injection, auth bypass, and regen regressions common in vibe-coded apps.
- Vibe-Eval’s agent-led tests caught 18/21 critical issues across three AI-generated samples; SonarQube and Snyk caught 7–9 each, mostly library risks.
- The best stack: keep Snyk for SBOM + CVEs, SonarQube for code hygiene, and let Vibe-Eval hammer live flows and AI surfaces before deploy.
- If your app uses AI output in the UI or runs model-suggested actions, you need dynamic, adversarial testing—not just static scans.
How We Tested
- Apps: Lovable SaaS billing front end, Cursor admin dashboard, and Replit Agent chatbot.
- Coverage: Auth flows, file uploads, webhook handling, prompt injection surfaces, role boundaries, and rate limits.
- Runs: Each tool scanned the same staging deployments; Vibe-Eval ran both regression and red-team profiles.
Findings by Tool
Vibe-Eval
- Flagged cross-tenant refund (IDOR) in the billing app within 47 seconds.
- Detected prompt injection leaking ticket history in the chatbot UI.
- Found missing webhook signature verification and replayable idempotency keys.
- Surfaced regression where regen removed CSRF token binding on the admin form.
SonarQube
- Warned on unused secrets and missing null checks; solid TypeScript hygiene.
- Missed runtime auth gaps and prompt injection because it lacked context of live flows.
Snyk
- Picked up two high-severity dependency CVEs and weak JWT signing defaults.
- No signal on UI injection or tenant scoping; requires manual policy to catch business-logic bugs.
When to Use What
- Use Snyk to guard your supply chain: SBOM, CVEs, and IaC misconfigurations.
- Use SonarQube to keep code quality sane: smells, complexity, and consistent patterns.
- Use Vibe-Eval to break the running app: auth abuse, prompt injection, and regen regressions that only show up at runtime.
Recommendation for Vibe Coders
- Run Snyk + SonarQube in CI for static coverage.
- Add Vibe-Eval as the dynamic gate on every preview deployment.
- Re-run Vibe-Eval after any AI regenerate or prompt tweak; static tools won’t see those changes.
CTA
Want the full comparison report? DM us or connect your staging app to Vibe-Eval and try the “Red Team Lite” profile—we’ll send you the raw findings.