.NET Driver release notes for 2025

This article contains the release notes for the .NET Driver, including the following when applicable:

  • Behavior changes

  • New features

  • Customer-facing bug fixes

Snowflake uses semantic versioning for .NET Driver updates.

See .NET Driver for documentation.

Version 4.4.1 (April 28, 2025)

New features and improvements

  • None.

Bug fixes

  • Fixed a Time-of-check Time-of-use (TOCTOU) race condition when checking access to Easy Logging configuration file. For more information, see CVE-2025-46326.

  • Fixed an issue with cancelling connecting with CancellationTokenSource.CancelAsync() that did not decrease the pool usage counter.

Version 4.4.0 (April 10, 2025)

New features and improvements

  • Added an SSO token cache for external browser authentication and the client_store_temporary_credential parameter to indicate whether to use the SSO cache.

Bug fixes

  • Fixed case insensitivity for authenticators. Before the fix, the logic for username_password_mfa and oauth was not properly applied if authenticators used uppercase characters.

  • Fixed an issue with passing null into a query parameter.

  • Fixed an issue with reading tokens from the Windows Credential Manager, which was used for username_password_mfa authenticator. In some cases the value read from the credential manager could be too long.

  • Made some small changes to credential manager implementations, such as changing some log levels and issuing a warning for too permissive cache directory permissions on Unix instead of changing the permissions automatically.

  • Fixed the binding of AnsiString parameters to the TEXT type.

  • Fixed loading structured or semi-structured data to a DataTable.

Version 4.3.0 (January 29, 2025)

New features and improvements

  • Added support for configuring connection parameters in TOML files.

  • Added an MFA token cache.

  • Added support for GCP region-specific endpoints.

  • Made encryption headers for files downloaded by GET be case insensitive.

  • The driver was tested with .net9 framework.

  • Extended documentation for checking CRL endpoints for Windows users.

Bug fixes

  • Improved security of intermediary files placed in OS temporary directories, which makes the files no longer world-readable. For more information, see CVE-2025-24788.

  • Fixed an issue with handling null data in failed responses.

  • Fixed an issue with logging diagnostic information.

  • Fixed an issue with handling of spaces in the file path for PUT command with GCS (Google Cloud Storage).

  • Fixed an issue with handling GCS endpoints without https:// prefix.

  • Fixed an issue with downloading files with a GET operation that don’t have the SFC_DIGEST property in their metadata.

  • Fixed the ability to use STDOUT as the log path in Easy Logging feature.

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