Wsgiserver 0.2 Cpython 3.10.4 Exploit [work] May 2026

This can lead to information disclosure or be used in phishing attacks to redirect users to malicious domains. 3. Application-Level Command Injection

Always sanitize user-provided paths and parameters to prevent traversal and injection attacks. nisdn/CVE-2021-40978 · GitHub

The primary reason these exploits succeed is the use of development servers in production settings.

Python versions through 3.10 (including 3.10.4) are susceptible to an vulnerability in the http.server module.

The server fails to protect against multiple slashes ( // ) at the beginning of a URI path.

Security professionals use tools like nmap or curl to identify these servers: nmap -sV -p 8000

Replace WSGIServer with robust alternatives like Gunicorn or Waitress.

Patching to newer versions (e.g., Python 3.10.9 or later) resolves core library vulnerabilities like CVE-2021-28861 .