An ASP.NET Core middleware that injects OWASP-recommended HTTP security headers with a single line of code.
OwaspHeaders.Core is an ASP.NET Core middleware that automatically injects OWASP-recommended HTTP security headers into web application responses. It helps developers implement critical security measures like Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security with minimal code, reducing the risk of common web vulnerabilities such as clickjacking, XSS, and data sniffing.
ASP.NET Core developers building web applications who need to quickly implement OWASP security header recommendations without manual configuration.
Developers choose OwaspHeaders.Core because it encapsulates OWASP security best practices into a single middleware call, saving time and ensuring consistent, up-to-date header implementation. Its builder pattern allows customization while maintaining compile-time safety.
Inject OWASP recommended HTTP Headers for increased security in a single line
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Adding all OWASP-recommended headers requires just one method call, app.UseSecureHeadersMiddleware(), drastically reducing setup time and potential human error.
It injects a full set of security headers like Content-Security-Policy and Strict-Transport-Security by default, addressing common vulnerabilities such as XSS and clickjacking without manual configuration.
Supports fine-tuning via a builder pattern, allowing developers to adjust specific headers (e.g., HSTS max-age) to meet compliance or application-specific needs while maintaining compile-time safety.
Removes headers like X-Powered-By by default, reducing the attack surface without additional code, as highlighted in the README's default configuration.
The README explicitly states it does not support Blazor or WebAssembly applications, limiting its usefulness for modern .NET UI frameworks that rely on these technologies.
Header policies are defined at compile time using the builder pattern, preventing runtime adjustments and making it inflexible for scenarios where headers need to change dynamically based on conditions.
Removing the Server header requires manual web.config modifications, as noted in the README, adding extra steps and complexity outside the middleware's scope.