Issues

• SqlParameter with a char[] value copies the whole array, ignoring Size

  Bug

  dotnet/SqlClient#5061 · Filter by author LukeButters opened on Nov 13, 2026
  1

• Managed SNI: TLS handshake ignores Connect Timeout, one stalled handshake blocks every OpenAsync on the pool

  Area\Managed SNI
  Bug

  dotnet/SqlClient#5045 · Filter by author tomasfil opened on Nov 12, 2026
  2

  

• Cancelling SqlBatch.ExecuteNonQueryAsync throws ArgumentOutOfRangeException from SqlCommand.GetBatchCommand instead of a cancellation exception

  Bug

  dotnet/SqlClient#5042 · Filter by author campersau opened on Nov 11, 2026
  1

  

• [macOS] Integrated authentication no longer requests Kerberos delegation in 6.1.x

  Bug

  dotnet/SqlClient#5040 · Filter by author mkmurray opened on Nov 11, 2026
  9

• .NET 11: async SqlClient queries use 20–35% more CPU than on .NET 10 (Windows, same SqlClient binary)

  External 🔗
  Bug

  dotnet/SqlClient#5034 · Filter by author rushfrisby opened on Nov 10, 2026
  3

  

• "Failover Partner" connection string setting with a Basic Availability Group no longer works in 7.1.x

  Triage Needed 🆕
  Bug

  dotnet/SqlClient#5029 · Filter by author kwhopper opened on Nov 10, 2026
  4

  

• Managed SNI: attention timeout publishes the failure before breaking the connection, so cleanup throws "another read operation is pending"

  Area\Managed SNI
  Bug

  dotnet/SqlClient#5022 · Filter by author a11smiles opened on Nov 9, 2026
  1

• Server error tokens are lost when SQL Server aborts the connection before the driver has posted its read (bare transport error instead of the server's error)

  Bug

  dotnet/SqlClient#4994 · Filter by author poizan42 opened on Nov 4, 2026
  1

• Suspected: async MARS command can lose its own fatal error, and sync MARS Read waits for CommandTimeout, after another session tears down the connection (managed SNI)

  Triage Needed 🆕
  Bug

  dotnet/SqlClient#4969 · Filter by author priyankatiwari08 opened on Nov 3, 2026

• SqlBulkCopy.WriteToServerAsync cancellation does not interrupt a table-lock wait

  Bug

  dotnet/SqlClient#4965 · Filter by author thomhurst opened on Nov 2, 2026
  2

• Issuing a Cancel on a CancellationToken while reading xe live target leads to blocking in a server packet

  Bug

  dotnet/SqlClient#4957 · Filter by author shueybubbles opened on Oct 30, 2026
  2

• Unsized varchar Output parameters return empty values and Output/InputOutput reuse fails with invalid Size

  Bug

  dotnet/SqlClient#4953 · Filter by author mdaigle opened on Oct 30, 2026

• Simplify SqlClient packaging with SDK pack and a generated .NET Standard contract

  Approval NeededCode Health 💊Common Project 🚮Design Review NeededUp-for-Grabs 🙌
  Feature

  dotnet/SqlClient#4940 · Filter by author paulmedynski opened on Oct 28, 2026 · 8.1.0-preview1
  1

• Promote CA2000 to warning and resolve existing disposal diagnostics

  Code Health 💊Up-for-Grabs 🙌
  Task

  dotnet/SqlClient#4937 · Filter by author paulmedynski opened on Oct 28, 2026
  1

• Packet multiplexing: async nvarchar(max) read returns corrupted value, throws ArgumentException or spins when the value starts in a packet with header ID 0

  Hotfix Candidate 🚑
  Bug

  dotnet/SqlClient#4925 · Filter by author MaceWindu opened on Oct 26, 2026 · 8.1.0-preview1
  15

  

• Failed streamed TVP request poison other requests in the application

  Bug

  dotnet/SqlClient#4921 · Filter by author m0a0k0s opened on Oct 26, 2026
  1

  

• Localize exception messages in Microsoft.Data.SqlClient.Extensions.Azure

  Task

  dotnet/SqlClient#4904 · Filter by author priyankatiwari08 opened on Oct 22, 2026

• Mark System.Data.SqlClient as deprecated on nuget.org

  Task

  dotnet/SqlClient#4859 · Filter by author Frulfump opened on Oct 19, 2026
  1

  

• Zombified transaction executes and auto-commits SQL command

  Bug

  dotnet/SqlClient#4855 · Filter by author branko-d opened on Oct 17, 2026
  2

  

• TLS handshake has no timeout, one stalled handshake can stop a pool from creating any new connections indefinitely.

  Area\Connectivity
  Bug

  dotnet/SqlClient#4834 · Filter by author LukeButters opened on Oct 13, 2026
  2

  

• ref/ assemblies do not match implementation assembly API surfaces

  Bug

  dotnet/SqlClient#4826 · Filter by author edwardneal opened on Oct 10, 2026
  3

• Harden Azure Key Vault trusted endpoint matching

  Area\AKV Provider
  Feature

  dotnet/SqlClient#4802 · Filter by author paulmedynski opened on Oct 7, 2026 · 8.1.0-preview1
  1

  

• Proposal: generate sync attestation methods from the async ones with a source generator

  dotnet/SqlClient#4799 · Filter by author virzak opened on Oct 7, 2026
  4

• Replace internal connection pool state enum with a boolean

  Feature

  dotnet/SqlClient#4795 · Filter by author priyankatiwari08 opened on Oct 6, 2026
  1

  

• SqlDataReader.GetFieldValue<byte[]>() cannot be used to read a native SQL Server JSON column.

  Bug

  dotnet/SqlClient#4758 · Filter by author KyMback opened on Sep 26, 2026
  2