Issues

• Blazor auto-pause fails after navigating to static SSR

  area-blazor
  Bug

  dotnet/aspnetcore#69869 · Filter by author kotlarmilos opened on Oct 16, 2026 · .NET 12 Planning
  1

  

• Package 'System.Security.Cryptography.Pkcs' 9.0.11 has a known moderate severity vulnerability when creating 10.0 SqlServer project.

  area-commandlinetools
  Bug

  dotnet/aspnetcore#69867 · Filter by author jinzhao1127 opened on Oct 16, 2026
  1

• OpenAPI: nullable enum parameter with a default value throws InvalidCastException

  area-minimal
  Bug

  dotnet/aspnetcore#69864 · Filter by author sander1095 opened on Oct 15, 2026
  2

• OpenAPI: record constructor default is written to the shared enum component instead of the $ref

  area-minimalRegression
  Bug

  dotnet/aspnetcore#69862 · Filter by author sander1095 opened on Oct 15, 2026
  1

• Backport #61316 (ParseHeaders throws ArgumentOutOfRangeException when CR is the last byte of a pipe segment) to release/8.0 and release/9.0

  area-networking
  Bug

  dotnet/aspnetcore#69858 · Filter by author v-yun opened on Oct 15, 2026
  2

• Kestrel accepts HTTP/1.1 request lines with no space before the version and silently rewrites the target (regression in #51535)

  area-networking
  Bug

  dotnet/aspnetcore#69857 · Filter by author v-yun opened on Oct 15, 2026
  1

• Quarantine Microsoft.AspNetCore.Server.Kestrel.Core.Tests.Http2KeepAliveTests.TimeoutExceeded_ConnectionFlowControlUsedUpThenPings_NoGoAway

  test-failure
  dotnet/aspnetcore#69853 · Filter by author github-actions opened on Oct 15, 2026
  1

• RedisOutputCacheStore garbage collection loop ignores disposal, keeping disposed hosts reachable for ~5 minutes

  area-middleware
  Bug

  dotnet/aspnetcore#69849 · Filter by author jaboko opened on Oct 15, 2026
  1

• Request new buffer in Utf8BufferTextWriter.Flush implementation

  area-minimalarea-signalrfeature-openapi
  Bug

  dotnet/aspnetcore#69847 · Filter by author Youssef1313 opened on Oct 15, 2026
  

• Revise AccessFailedCount handling

  area-identity
  Bug

  dotnet/aspnetcore#69846 · Filter by author Youssef1313 opened on Oct 15, 2026 · .NET 12 Planning
  1

• [API Proposal] Add the Cookie Store API to the typed browser platform APIs for Blazor

  api-proposalapi-suggestionarea-blazor
  Feature

  dotnet/aspnetcore#69844 · Filter by author jsakamotoIGJP opened on Oct 15, 2026 · .NET 12 Planning
  1

• Explicitly set MaxDepth when using Newtonsoft.Json for SignalR hub protocol

  area-signalr
  dotnet/aspnetcore#69842 · Filter by author elinor-fung opened on Oct 14, 2026
  1

• Blazor Server: RemoteJSDataStream is orphaned and ends the circuit when sendJSDataStream initiation throws

  area-blazorinvestigate
  Bug

  dotnet/aspnetcore#69838 · Filter by author paulszabo-cmyk opened on Oct 14, 2026 · Backlog
  1

  

• IIS out-of-process hosting truncates X-Forwarded-For when the forwarded value exceeds USHORT

  area-networking
  Bug

  dotnet/aspnetcore#69831 · Filter by author DeagleGross opened on Oct 14, 2026

• JsonTranscodingRouteAdapter drops literal constraints from single-segment variables

  area-grpc
  Bug

  dotnet/aspnetcore#69830 · Filter by author DeagleGross opened on Oct 14, 2026
  1

• A union that System.Text.Json cannot classify makes every Minimal API route return 500 (and fails startup with MVC)

  area-minimal
  Bug

  dotnet/aspnetcore#69826 · Filter by author robertodalmonte opened on Oct 14, 2026 · .NET 12 Planning
  4

  

• Virtualize AnchorMode.End end scroll is undone by stale spacer correction

  area-blazor
  Bug

  dotnet/aspnetcore#69823 · Filter by author JamesNK opened on Oct 13, 2026 · .NET 12 Planning
  1

  

• Kestrel HTTP/1: control characters accepted in header names, chunk extensions, and trailer names; RFC 9110 6.6 forbidden trailer fields stored unfiltered (hardening)

  area-networking
  Feature

  dotnet/aspnetcore#69820 · Filter by author zakkariyaa opened on Oct 13, 2026
  3

• Kestrel HTTP/1: chunk size greater than Int32.MaxValue produces unhandled IOException (OverflowException) and HTTP 500 instead of 400

  area-networking
  Bug

  dotnet/aspnetcore#69819 · Filter by author zakkariyaa opened on Oct 13, 2026
  1

• Support collection-length validation for multiple-select inputs in Blazor SSR

  area-blazor
  Feature

  dotnet/aspnetcore#69788 · Filter by author oroztocil opened on Oct 13, 2026 · .NET 12 Planning
  1

  

• Microsoft.AspNetCore.OpenApi XML comment generator emits OS-dependent line endings in summary/description

  area-minimal
  Bug

  dotnet/aspnetcore#69786 · Filter by author alexaka1 opened on Oct 13, 2026
  1

• Add NavigationOptions.ForceDocumentNavigation for Explicit Document Navigation Across SSR and Interactive Render Modes

  api-proposalarea-blazordesign-proposal
  Feature

  dotnet/aspnetcore#69785 · Filter by author irfanajaffer opened on Oct 13, 2026 · Backlog
  1

• ANCM out-of-process handler can retain a stale backend after the listener process exits

  area-networkingfeature-iis
  Bug

  dotnet/aspnetcore#69784 · Filter by author DeagleGross opened on Oct 13, 2026

• Editing machine.config "crashes" the App Pools (shutdown)

  area-networking
  Bug

  dotnet/aspnetcore#69781 · Filter by author lionkmp opened on Oct 12, 2026
  3

• Inject services from a host-owned DI scope into Razor components

  api-proposalarea-blazordesign-proposal
  Feature

  dotnet/aspnetcore#69774 · Filter by author ScarletKuro opened on Oct 12, 2026 · Backlog
  1