Flask-Talisman

Flask-Talisman is a small Flask extension that sets HTTP security headers to help protect against common web application security issues like Cross-Site Scripting (XSS) and clickjacking. It provides a simple way to configure Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), X-Frame-Options, and more. The library is actively maintained, with version 1.1.0 released in August 2023, and releases typically occur as needed for bug fixes or new feature/policy additions. [1, 3, 5]