dotnet /aspnetcore
ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.
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README
ASP.NET Core
============
ASP.NET Core is an open-source and cross-platform framework for building modern cloud-based internet-connected applications, such as web apps, IoT apps, and mobile backends. ASP.NET Core apps run on .NET, a free, cross-platform, and open-source application runtime. It was architected to provide an optimized development framework for apps that are deployed to the cloud or run on-premises. It consists of modular components with minimal overhead, so you retain flexibility while constructing your solutions. You can develop and run your ASP.NET Core apps cross-platform on Windows, Mac, and Linux. Learn more about ASP.NET Core.
Get started
Follow the Getting Started instructions.
Also check out the .NET Homepage for released versions of .NET, getting started guides, and learning resources.
See the Triage Process document for more information on how we handle incoming issues.
How to engage, contribute, and give feedback
Some of the best ways to contribute are to try things out, file issues, join in design conversations,
and make pull-requests.
Download our latest daily builds
Follow along with the development of ASP.NET Core:
Community Standup: The community standup is held every week and streamed live on YouTube. You can view past standups in the linked playlist.
Roadmap: The schedule and milestone themes for ASP.NET Core.
Build ASP.NET Core source code
Check out the contributing page to see the best places to log issues and start discussions.
Reporting security issues and bugs
Security issues and bugs should be reported privately to the Microsoft Security Response Center (MSRC) via the MSRC Researcher Portal. You should receive a response within 24 hours. Further information can be found in the MSRC Report an Issue FAQ. You can also find these instructions in this repo's Security doc.
Also see info about related Microsoft .NET Bounty Program.
Related projects
These are some other repos for related projects:
Documentation - documentation sources for https://learn.microsoft.com/aspnet/core/
Entity Framework Core - data access technology
Runtime - cross-platform runtime for cloud, mobile, desktop, and IoT apps
Razor - the Razor compiler and tooling for working with Razor syntax (.cshtml, .razor)
Code of conduct
See CODE-OF-CONDUCT
Nightly builds
This table includes links to download the latest builds of the ASP.NET Core Shared Framework. Also included are links to download the Windows Hosting Bundle, which includes the ASP.NET Core Shared Framework, the .NET Runtime Shared Framework, and the IIS plugin (ASP.NET Core Module). You can download the latest .NET Runtime builds here, and the latest .NET SDK builds here. If you're unsure what you need, then install the SDK; it has everything except the IIS plugin.
| Platform | Shared Framework (Installer) | Shared Framework (Binaries) | Hosting Bundle (Installer) |
| :--------- | :----------: | :----------: | :----------: |
| Windows x64Top issues
#17730Real multithreading in Blazor WebAssembly239 comments · 2019-12-10#35077Support for MAUI runtimes in ASP.NET Core?198 comments · 2021-08-03#66957[aw] Detection Runs146 comments · 2026-06-01#51202Add Microsoft Identity Platform auth option to the Blazor Web App template107 comments · 2023-10-07#7246dev-certificates on Linux -- how to get dotnet-to-dotnet comms to work?80 comments · 2019-02-04#14907ConfigureTestContainer not working with GenericHost66 comments · 2019-10-10#12102Using SignalR core with Unity and IL2CPP (AOT)65 comments · 2019-07-11#3849startMode="AlwaysRunning" for inProcess ANCM65 comments · 2018-01-05
Discussions
#70074Data Protection and Shortened Certificate lifetimes1 comments · 2026-10-28#70040Microsoft Security Advisory CVE-2026-114148 | .NET Elevation of Privilege Vulnerability0 comments · 2026-10-25#70039Microsoft Security Advisory CVE-2026-102870 | ASP.NET Core Remote Code Execution Vulnerability | October 25, 2026 OOB update0 comments · 2026-10-25#70026Clarification on whether the new Blazor SSR validation JS supports MVC/Razor Pages markup as well?1 comments · 2026-10-23#69803Microsoft Security Advisory CVE-2026-96236 | ASP.NET Core Denial of Service Vulnerability1 comments · 2026-10-13#69802Microsoft Security Advisory CVE-2026-96230 | ASP.NET Core Remote Code Execution Vulnerability1 comments · 2026-10-13#69801Microsoft Security Advisory CVE-2026-92707 | ASP.NET Core Denial of Service Vulnerability1 comments · 2026-10-13#69800Microsoft Security Advisory CVE-2026-88092 | ASP.NET Core Security Feature Bypass Vulnerability1 comments · 2026-10-13
Latest release
.NET 10.0.13 v10.0.13 2026-10-13Release What's Changed [release/10.0] Source code updates from dotnet/dotnet by @dotnet-maestro[bot] in https://github.com/dotnet/aspnetcore/pull/68601 [release/10.0] Enable CFG for ARM64X ANCM forwarders by @github-actions[bot] in https://github.com/dotnet/aspnetcore/pull/68758 [release/10.0] Source code updates from dotnet/dotnet by @dotnet-maestro[bot] in https://github.com/dotnet/aspnetcore/pull/68767 [release/10.0] Fix installer background for bundles by @wtgodbe in https://github.com/dotnet/aspnetcore/pull/68932 [release/10.0] Extract IsAuthenticated helper method by @Youss