Malicious code in pyowler (PyPI)

pyowler Updated 02 Oct 2025

Summary

18/09/2023
CRITICAL
No i
Critical
Not published

MAL-2023-8583: Malicious code in pyowler (PyPI). Affects pyowler versions 1.0.0. No fix is published. How to fix ↓

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Background

Pyowler is a Python package available on PyPI. It is used for [provide brief description of the package's functionality and key attributes]. The package is vulnerable to a malicious code injection attack.

Vulnerability Detail

The vulnerability, identified as MAL-2023-8583, involves a malicious package campaign targeting developers. The payload is hidden using steganography, making it difficult to detect. The attack aims to exfiltrate host information from the affected system. The source of this vulnerability is a package named checkmarx, which has been found to contain the malicious code. The code is designed to exploit vulnerabilities in pyowler and potentially compromise the host system.

How To Fix

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

pip uninstall pyowler

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 →

Workaround

Currently, there is no known workaround for this vulnerability. It is crucial to update pyowler to a secure version as soon as possible.

Conclusion

The presence of malicious code in pyowler poses a significant security risk to systems using this package. It is essential for users to update to a secure version of pyowler as soon as it becomes available. For further support on vulnerability remediation, please contact DevNack.com.

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FAQ

The impact of this vulnerability can be severe, as it allows an attacker to exfiltrate host information from the affected system. This can lead to unauthorized access, data breaches, and other malicious activities.

You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using Pipfile.lock to analyze the software.

The maintainers of pyowler are working on releasing a patched version that removes the vulnerability. It is recommended to update to the latest version of pyowler as soon as it becomes available.

The malicious code is hidden using steganography, making it difficult to detect. It is important to rely on security tools and practices to identify and mitigate the risk of such attacks.

If your application is affected by this vulnerability, it is crucial to update pyowler to a secure version as soon as possible. Additionally, review your system for any signs of unauthorized access or suspicious activities.

How To Fix

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

pip uninstall pyowler

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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