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DefaultActionDescriptorCollectionProvider never disposes the handle returned by ChangeToken.Change(...)

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

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

Status: Open.

#66425 In dotnet/aspnetcore;

· kvantetore opened on Apr 22, 2026

Exception when trying to return Problem or ValidationProblem with an extension with a key that is already set internally

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

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

feature-problem-details

Status: Open.

#66407 In dotnet/aspnetcore;

· bartvanandel opened on Apr 21, 2026

Razor view outputs value instead of the Nullable<bool> value in a form element.

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

Status: Open.

#65933 In dotnet/aspnetcore;

· eric-miller-cdfw opened on Mar 23, 2026

UseKestrel(port) silently ignores port parameter on derived WebApplicationFactory from WithWebHostBuilder()

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

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

feature-mvc-testingMVC testing packageMVC testing package

Status: Open.

#65877 In dotnet/aspnetcore;

· danroth27 opened on Mar 19, 2026

ProblemDetailsContext for CustomizeProblemDetails never contains an Exception for Controllers

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

feature-problem-details

Status: Open.

#65697 In dotnet/aspnetcore;

· Annxii opened on Mar 7, 2026

Razor HTML Encoding Behaves Differently Inside Function Parameter vs Variable Assignment in <script> Block

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

untriaged

Status: Open.

#65767 In dotnet/aspnetcore;

· badrshs opened on Mar 4, 2026

·  

Backlog

Auto-generated Program.cs does not have a namespace

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

design-proposalThis issue represents a design proposal for a different issue, linked in the descriptionThis issue represents a design proposal for a different issue, linked in the description

Status: Open.

#65509 In dotnet/aspnetcore;

· Markz878 opened on Feb 23, 2026

JsonPatchDocumentConverter is not public

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

feature-json-patch

Status: Open.

#65393 In dotnet/aspnetcore;

· grosch-intl opened on Feb 11, 2026

ApiExplorer doesn't propagate non-success Results types

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

feature-openapi

Status: Open.

#65371 In dotnet/aspnetcore;

· klinki opened on Feb 9, 2026

[MVC and Razor Pages] RenderFragment-like generics support (as what is available in Blazor) in traditional MVC and Razor Pages

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

Status: Open.

#65281 In dotnet/aspnetcore;

· techgems opened on Jan 31, 2026

Model binding with [FromQuery] fails when parameter name is 'filter' but succeeds when renamed

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

Status: Open.

#65220 In dotnet/aspnetcore;

· selfmadecode opened on Jan 25, 2026

Deprecate the Razor runtime compilation NuGet package

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

Status: Open.

#65170 In dotnet/aspnetcore;

· danroth27 opened on Jan 21, 2026