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[dnceng-bot] Branch aspnetcore/release/9.0 can't be merged to Azdo internal branch

area-infrastructureIncludes: MSBuild projects/targets, build scripts, CI, Installers and shared frameworkIncludes: MSBuild projects/targets, build scripts, CI, Installers and shared framework

ExternalThis is an issue in a component not contained in this repository. It is open for tracking purposes.This is an issue in a component not contained in this repository. It is open for tracking purposes.

Status: Open.

#66592 In dotnet/aspnetcore;

· dotnet-maestro-bot opened on May 6, 2026

[dnceng-bot] Branch aspnetcore/release/8.0 can't be merged to Azdo internal branch

area-infrastructureIncludes: MSBuild projects/targets, build scripts, CI, Installers and shared frameworkIncludes: MSBuild projects/targets, build scripts, CI, Installers and shared framework

bugThis issue describes a behavior which is not expected - a bug.This issue describes a behavior which is not expected - a bug.

Status: Open.

#66591 In dotnet/aspnetcore;

· dotnet-maestro-bot opened on May 6, 2026

RequireHost with wildcard matches "empty" subdomain

area-routing

bugThis issue describes a behavior which is not expected - a bug.This issue describes a behavior which is not expected - a bug.

Status: Open.

#66581 In dotnet/aspnetcore;

· cincuranet opened on May 5, 2026

How to server blazor.web.js when the build version and runtime version don't match

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

feature-request

Status: Open.

#66580 In dotnet/aspnetcore;

· JamesNK opened on May 5, 2026

[API Proposal]: WebApplicationFactory.ConfigureHostApplicationBuilder for early test config override

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

feature-mvc-testingMVC testing packageMVC testing package

Status: Open.

Feature

#66574 In dotnet/aspnetcore;

· Youssef1313 opened on May 4, 2026

Perf regression: antiforgery-noop, antiforgery-validation, https

area-perfPerformance infrastructure issuesPerformance infrastructure issues

perf-regression

Status: Open.

#66568 In dotnet/aspnetcore;

· pr-benchmarks opened on May 2, 2026

Perf improvement: json, tls-handshakes-httpsys

area-perfPerformance infrastructure issuesPerformance infrastructure issues

perf-regression

Status: Open.

#66565 In dotnet/aspnetcore;

· pr-benchmarks opened on May 1, 2026

·  

11.0-preview5

Perf improvement: json, kestrel-encoded-url

area-perfPerformance infrastructure issuesPerformance infrastructure issues

perf-regression

Status: Open.

#66557 In dotnet/aspnetcore;

· pr-benchmarks opened on May 1, 2026

<script type="module" src="..."> is fetched twice in published MVC apps when importmap is present

area-middlewareIncludes: URL rewrite, redirect, response cache/compression, session, and other general middlewaresIncludes: URL rewrite, redirect, response cache/compression, session, and other general middlewares

bugThis issue describes a behavior which is not expected - a bug.This issue describes a behavior which is not expected - a bug.

Status: Open.

Bug

#66553 In dotnet/aspnetcore;

· AslanAmca opened on Apr 30, 2026

Revise obsolete APIs intended to be removed, and consider removing in .NET 11

api-proposal

api-suggestionEarly API idea and discussion, it is NOT ready for implementationEarly API idea and discussion, it is NOT ready for implementation

area-mvcIncludes: MVC, Actions and Controllers, Localization, CORS, most templatesIncludes: MVC, Actions and Controllers, Localization, CORS, most templates

feature-obsoletion

Status: Open.

Task

#66551 In dotnet/aspnetcore;

· Youssef1313 opened on Apr 30, 2026

Investigate redesign of public types to unions

area-minimalIncludes minimal APIs, endpoint filters, parameter binding, request delegate generator etcIncludes minimal APIs, endpoint filters, parameter binding, request delegate generator etc

feature-request

Status: Open.

#66549 In dotnet/aspnetcore;

· DeagleGross opened on Apr 30, 2026

·  

.NET 11 Planning

Blazor: Verify union types work in component parameters and JSInterop

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

feature-request

Status: Open.

#66548 In dotnet/aspnetcore;

· DeagleGross opened on Apr 30, 2026

·  

.NET 11 Planning