Windows Executable / Dangerous Extension Blocklist Regex for Python

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching windows executable / dangerous extension blocklist, ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# Windows Executable / Dangerous Extension Blocklist
# ReDoS-safe | RegexVault — Dev & Systems > File Paths

import re

windows_executable_dangerous_extension_blocklist_pattern = re.compile(r'\.(exe|bat|cmd|com|pif|scr|vbs|vbe|js|jse|wsf|wsh|msi|ps1|psm1|psd1|lnk|hta|jar|py|sh|bash|zsh|fish|dll|sys|drv|reg|inf)$')

def validate_windows_executable_dangerous_extension_blocklist(value: str) -> bool:
    return bool(windows_executable_dangerous_extension_blocklist_pattern.fullmatch(value))

# Example
print(validate_windows_executable_dangerous_extension_blocklist("malware.exe"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Dev & Systems > File Paths category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Use as a BLOCKLIST — a MATCH means the file should be blocked or handled with elevated caution. This list is not exhaustive. Adjust based on your threat model and deployment environment.