---
title: URL Redirects Must Be In Allow List
impact: LOW
impactDescription: prevents open redirect vulnerabilities
tags: redirect, url, allow-list, validation, security
---

## URL Redirects Must Be In Allow List

This rule ensures high quality and security in Python and PySpark applications.

**Implementation Guidance:**
- Follow standard Python best practices (PEP 8)
- Use type hints for better clarity
- For PySpark, prefer DataFrame API over SQL strings where possible
- Ensure proper resource management (using \`with\` statements)