CVE-2025-24788: Snowflake Connector for .NET has weak temporary files permissions
Issue Snowflake discovered and remediated a vulnerability in the Snowflake Connector for .NET in which files downloaded from stages are temporarily placed in a world-readable local directory, making them accessible to unauthorized users on the same machine.
This vulnerability affects versions 2.0.12 through 4.2.0 on Linux and macOS. Snowflake fixed the issue in version 4.3.0.
Vulnerability Details When downloading files from stages, the Snowflake Connector for .NET uses the OS temporary directory to save files before copying them to the destination directory. The files in the temporary directory, which are removed once the write to the destination directory concludes, have world-readable permissions on Linux and macOS. This could allow any user on the local machine to access them during their limited lifetime.
Solution Snowflake released version 4.3.0 of the Snowflake Connector for .NET, which fixes this issue. We recommend users upgrade to version 4.3.0.
Additional Information If you discover a security vulnerability in one of our products or websites, please report the issue to HackerOne. For more information, please see our Vulnerability Disclosure Policy.
Other sources
snowflake-connector-net is the Snowflake Connector for .NET. Snowflake discovered and remediated a vulnerability in the Snowflake Connector for .NET in which files downloaded from stages are temporarily placed in a world-readable local directory, making them accessible to unauthorized users on the same machine. This vulnerability affects versions 2.0.12 through 4.2.0 on Linux and macOS. Snowflake fixed the issue in version 4.3.0.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-24788?
CVE-2025-24788 is considered a high severity vulnerability due to the potential exposure of sensitive files to unauthorized users.
How do I fix CVE-2025-24788?
To fix CVE-2025-24788, upgrade the Snowflake Connector for .NET to version 4.3.0 or later.
What software is affected by CVE-2025-24788?
CVE-2025-24788 affects versions of the Snowflake Connector for .NET between 2.0.12 and 4.2.0.
What are the consequences of CVE-2025-24788?
The consequence of CVE-2025-24788 is that files downloaded from stages may be accessed by unauthorized users, risking data confidentiality.
When was CVE-2025-24788 discovered?
CVE-2025-24788 was discovered and remediated by Snowflake in the recent security review of their Connector for .NET.