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X-aspnetmvc-version [hot] Jun 2026

Expected output: (none).

The cleanest way to remove this header is within your application code. Open your Global.asax.cs file and add the following line to the Application_Start method:

HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 Server: Microsoft-IIS/10.0 X-AspNetMvc-Version: 5.2 X-AspNet-Version: 4.0.30319 Use code with caution. Why Does It Exist?

Since the header provides no functional benefit to your end-users, the best practice is to disable it entirely. 1. The Global.asax Method (Recommended) x-aspnetmvc-version

In traditional ASP.NET MVC applications, the header is removed by modifying the Global.asax file. Developers must handle the Application_Start event and set the MvcHandler to disable the version header.

By broadcasting the specific framework version, the server provides potential attackers with valuable intelligence. If an application is running an outdated version of ASP.NET MVC that contains known vulnerabilities (CVEs), an attacker can use this header to fingerprint the server. Once the version is identified, the attacker can tailor their exploit strategy to target specific weaknesses associated with that release.

For example, a typical response header might look like this: Expected output: (none)

In the landscape of web development and information security, HTTP response headers play a pivotal role in facilitating communication between the server and the client. Among these, the X-AspNetMvc-Version header is a specific identifier used by applications built on the Microsoft ASP.NET MVC framework.

Allowing client-side tools or proxies to understand the capabilities of the backend framework.

Here are some best practices related to x-aspnetmvc-version : Why Does It Exist

Removing X-AspNetMvc-Version is a standard hardening procedure for ASP.NET applications. The method depends on the version of the framework being used:

X-AspNetMvc-Version is a non-standard HTTP response header automatically injected by the ASP.NET MVC framework. Its primary purpose is to inform the client (usually a web browser or a consuming API service) about the specific version of the MVC framework currently running on the server.