Malicious Code Detected in Colugo Package (npm)
Summary
MAL-2025-17304: Malicious code in colugo (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
Colugo is an npm package designed for specific functionalities within JavaScript applications. It is utilized by developers for its features that enhance application performance and user experience. However, recent findings have revealed that the package contains malicious code, posing significant security risks to applications that rely on it.
Vulnerability Detail
The vulnerability stems from the inclusion of malicious code within the colugo package, which was introduced in version 0 and affects all subsequent versions. This malicious code can lead to unauthorized access, data breaches, or even complete system compromise, depending on how the package is integrated into applications. Developers using colugo should be aware of the potential ramifications, including loss of sensitive data and damage to application integrity.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall colugoIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, consider removing the colugo package from your project until a secure version is available. You can do this by executing: 'npm uninstall colugo'. Additionally, monitor your application for any unusual behavior that may indicate exploitation of this vulnerability.
Conclusion
The discovery of malicious code in the colugo package highlights the importance of regularly monitoring and updating open-source dependencies. Developers should take immediate action to mitigate risks associated with this vulnerability by updating or removing the affected package.
See every vulnerability recorded for colugo →
FAQ
Colugo is an npm package used in JavaScript applications to enhance performance and user experience.
The malicious code can lead to unauthorized access and potential data breaches.
You can use Vulert's playground at Vulert Scanner to check if your application is affected without needing to sign up.
As a temporary measure, consider uninstalling the colugo package and monitoring your application for any suspicious activity.
More details can be found in the vulnerability report at https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/colugo/MAL-2025-17304.json.
