Snowflake.Data 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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Snowflake.Data | >= 2.0.12, < 4.3.0 | 4.3.0 |
References
- https://github.com/snowflakedb/snowflake-connector-net/security/advisories/GHSA-2mqw-rq5m-8hc8
- https://nvd.nist.gov/vuln/detail/CVE-2025-24788
- https://github.com/snowflakedb/snowflake-connector-net/commit/89d91e8316ca213c5d184bcf469ed93977a5edf9
- https://github.com/snowflakedb/snowflake-connector-net
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-276- Platform
- .NET (NuGet)
- Package
Snowflake.Data- Disclosed
- 29.01.2025
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2mqw-rq5m-8hc8 - CC BY 4.0
Vulnerability history: Snowflake.Data
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 06.2023 04.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 2
- Low 1
Disclosures per year
- 2023: 2
- 2024: 0
- 2025: 2
- 2026: 0
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Snowflake.Data has weak temporary files permissions this entry
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