Malicious Code Vulnerability in memtools: A Critical Security Risk

memtools Updated 02 Oct 2025

Summary

31/07/2025
CRITICAL
No i
Critical
Not published

MAL-2025-6549: Malicious code in memtools (PyPI). Affects memtools versions 2.0.0. No fix is published. How to fix ↓

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Background

memtools is a Python package available on PyPI that provides various memory management utilities. It is designed to help developers efficiently handle memory-related tasks in their applications. However, a recent vulnerability has been identified that allows malicious code execution, posing a significant risk to users who incorporate this package into their projects.

Vulnerability Detail

The vulnerability identified as MAL-2025-6549 involves the inclusion of malicious code within the memtools package, specifically in version 2.0.0. This malicious code can lead to unauthorized access, data breaches, or system compromise. The origin of this vulnerability is linked to a malicious actor who has tampered with the package, making it imperative for users to be vigilant about the packages they install from PyPI.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

pip uninstall memtools

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

As a temporary workaround, users can avoid using the memtools package until a secure version is confirmed. Additionally, consider using alternative packages that provide similar functionality without the associated risks.

Conclusion

The memtools package has been compromised with malicious code, creating a serious security vulnerability for users. It is crucial to update to the latest version or find alternative solutions to ensure the safety of your applications. Regular monitoring of your dependencies is essential to maintain security.

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FAQ

The vulnerability involves malicious code embedded in the memtools package, which can lead to security breaches.

You can use Vulert, which monitors and alerts for open-source vulnerabilities. Visit Vulert Scanner to check your application without needing to sign up.

You should uninstall the affected version and update to a patched version as soon as possible using pip install --upgrade memtools.

Yes, consider using other memory management libraries that do not have known vulnerabilities.

Utilizing tools like Vulert can help you monitor your dependencies for vulnerabilities in real-time.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

pip uninstall memtools

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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