Microsoft.Security.AntiSSRF 1.0.1

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 
dotnet add package Microsoft.Security.AntiSSRF --version 1.0.1
                    


                    

                
NuGet\Install-Package Microsoft.Security.AntiSSRF -Version 1.0.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Microsoft.Security.AntiSSRF" Version="1.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Microsoft.Security.AntiSSRF" Version="1.0.1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Microsoft.Security.AntiSSRF" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Microsoft.Security.AntiSSRF --version 1.0.1
                    


                    

                
#r "nuget: Microsoft.Security.AntiSSRF, 1.0.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Microsoft.Security.AntiSSRF@1.0.1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Microsoft.Security.AntiSSRF&version=1.0.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Microsoft.Security.AntiSSRF&version=1.0.1
                    


                            Install as a Cake Tool

Microsoft AntiSSRF Library for .NET

The Microsoft AntiSSRF Library for .NET is a security-developed, exhaustively-tested library that provides robust URL validation to protect .NET applications from Server-Side Request Forgery (SSRF) vulnerabilities. Designed specifically for .NET Framework and .NET Core applications, it integrates seamlessly with HttpClient through the AntiSSRFHandler class, allowing developers to secure outbound HTTP requests with minimal code changes.

How to Use

The AntiSSRF Library provides validation for different scenarios based on your trust requirements:

Use Case Description Documentation Link
General Case The untrusted URL can belong to any domain or an untrusted domain. AntiSSRFPolicy
Azure Key Vault Domain The untrusted URL must be an Azure Key Vault endpoint. URIValidator.InAzureKeyVaultDomain
Azure Storage Domain The untrusted URL must be an Azure Storage endpoint. URIValidator.InAzureStorageDomain
Allowlist of Trusted Domains The untrusted URL must belong to a specific, trusted domain. URIValidator.InDomain

Key Features

  • SSRF Attack Prevention - Blocks malicious server-side request forgery attempts

  • Private Network Protection - Separate built-in configuration options for internal vs. external address HTTP clients

  • DNS Rebinding Protection - Guards against DNS-based attacks

  • Redirect Protection - Re-validates on all redirects to prevent bypass attempts

  • Protocol Validation - Ensures only safe protocols are used

  • Fully Customizable - Configure domain allowlists, IP ranges, headers, and validation policies

Additional Documentation

Explore our comprehensive documentation to get the most out of Microsoft AntiSSRF:

Getting Started

API Documentation

Feedback & Contributing

We welcome feedback and contributions from the community! Here's how you can get involved:

Support Policy

For support inquiries, contact antissrf-oss@microsoft.com.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on Microsoft.Security.AntiSSRF:

Package Downloads
Microsoft.Diagnostics.Runtime

ClrMD is a set of advanced APIs for programmatically inspecting a crash dump of a .NET program much in the same way that the SOS Debugging Extensions (SOS) do. This allows you to write automated crash analysis for your applications as well as automate many common debugger tasks. In addition to reading crash dumps ClrMD also allows supports attaching to live processes.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.0.1 258 10/8/2026
1.0.0 115,838 5/5/2026