OWASP Input Validation Cheat Sheets

1. Input Validation

   Syntactic and semantic validation, allow-lists and regular expression safety.

2. Bean Validation

   Java Bean Validation annotations and constraints.

3. Email Validation and Verification

   Safe email address validation and verification flows.

4. Unvalidated Redirects and Forwards

   Validating redirect targets.

5. Prototype Pollution Prevention

   Preventing object prototype pollution from untrusted input.

6. Denial of Service

   Input size limits, ReDoS and resource exhaustion.

7. XML Security

   XML parsing and schema validation hazards.

8. Mass Assignment

   Allow-listing bindable fields.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.