Snowflake Connector for .NET has race condition when checking access to Easy Logging configuration file

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

3.3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2025-46326: 0.17% estimated exploitation activity in the next 30 days; percentile 5.71 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Issue Snowflake discovered and remediated a vulnerability in the Snowflake Connector for .NET (“Connector”). When using the Easy Logging feature on Linux and macOS, the Connector didn’t correctly verify the permissions of the logging configuration file, potentially allowing an attacker with local access to overwrite the configuration and gain control over logging level and output location. This vulnerability affects Connector versions 2.1.2 through 4.4.0. Snowflake fixed the issue in version 4.4.1. Vulnerability Details When using the Easy Logging feature on Linux and macOS, the Connector reads logging configuration from a user-provided file. On Linux and macOS, the Connector verifies that the configuration file can be written to only by its owner. That check was vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition and failed to verify that the file owner matches the user running the Connector. This could allow a local attacker with write access to the configuration…

Published by the source

28 Apr 2025, 20:25 UTC

Last modified by the source

29 Apr 2025, 13:10 UTC

Source last checked

26 Oct 2026, 17:03 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-c82r-c9f7-f5mj

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# Patch Next advisory brief: CVE-2025-46326

Advisory: Snowflake Connector for .NET has race condition when checking access to Easy Logging configuration file
IDs: CVE-2025-46326, GHSA-c82r-c9f7-f5mj
Record: https://patchnext.com/advisories/cve-2025-46326 (revision 1, source checked 26 Oct 2026, 17:03 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: snowflake.data 4.4.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet snowflake.data: affected >= 2.1.2, <= 4.4.0; fixed in 4.4.1

## Suggested inspection (read-only)
- NuGet snowflake.data: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on snowflake.data.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-c82r-c9f7-f5mj (GitHub-reviewed advisory GHSA-c82r-c9f7-f5mj lists affected ranges: NuGet snowflake.data >=2.1.2 <=4.4.0)

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