INJ-003high SeverityInjection Sinks & Input Validation
Runtime Schema Validation on All Incoming API Requests (Zod/Valibot)
Agents typecast request bodies using TypeScript interfaces (const body = await req.json() as UserInput) with zero runtime validation.
1-Click Fix Prompt for Cursor & Claude Code
Review my codebase for "Runtime Schema Validation on All Incoming API Requests (Zod/Valibot)" (INJ-003). Issue: Agents typecast request bodies using TypeScript interfaces (const body = await req.json() as UserInput) with zero runtime validation. Remediation required: Validate every request body and query parameter using a runtime schema library like Zod. Please: 1. Locate any occurrences of this issue across my repository. 2. Refactor the code to follow production standards without breaking existing functionality. 3. Provide a clear command or step to test and verify the fix.
Why AI Assistants Write This Bug
Agents typecast request bodies using TypeScript interfaces (const body = await req.json() as UserInput) with zero runtime validation.
AI code generation prioritizes immediate syntax execution over production edge cases. When an assistant hits an undefined variable or strict type error, it frequently takes the path of least resistance rather than implementing standard pre-launch security patterns.
Code Comparison
Common AI Code PatternVulnerable
// Vulnerable AI-generated pattern for: Runtime Schema Validation on All Incoming API Requests (Zod/Valibot)
// Problematic pattern: Agents typecast request bodies using TypeScript interfaces (const body = await req.json() as UserInput) with zero runtime validation.Launch-Ready Fix
// Production-ready fix for: Runtime Schema Validation on All Incoming API Requests (Zod/Valibot)
// Recommended remediation: Validate every request body and query parameter using a runtime schema library like Zod.Remediation & Verification Checklist
Remediation: Validate every request body and query parameter using a runtime schema library like Zod.
- Search your codebase for pattern matching "Runtime Schema Validation on All Incoming API Requests (Zod/Valibot)".
- Apply the recommended remediation: Validate every request body and query parameter using a runtime schema library like Zod.
- Run local build and test commands to ensure no regressions.
- Verify in your browser or with curl that the issue is resolved.
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