Malicious Code Detected in generator-rollup: Security Alert

generator-rollup Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-21301: Malicious code in generator-rollup (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The package generator-rollup is a tool designed to facilitate the creation of Rollup-based projects, providing developers with a streamlined way to set up their build configurations. It is widely used in the JavaScript ecosystem for bundling modules and optimizing code for production. However, recent findings have uncovered that this package contains malicious code, posing significant security risks to users who have integrated it into their projects.

Vulnerability Detail

The vulnerability stems from the inclusion of malicious code within the generator-rollup package. This code can potentially compromise the security of applications that utilize this package, leading to unauthorized access, data breaches, or other malicious activities. The package was found to have introduced this malicious behavior from its initial version, making it imperative for users to take immediate action to mitigate risks.

How To Fix

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

npm uninstall generator-rollup

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 remove the generator-rollup package from their project until a secure version is released. This can be done by executing the following command: npm uninstall generator-rollup. Consider using alternative packages that do not have known vulnerabilities.

Conclusion

The discovery of malicious code in the generator-rollup package highlights the importance of maintaining secure dependencies in software projects. Users are urged to take immediate action by updating or removing the affected package to safeguard their applications.

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FAQ

The malicious code can perform unauthorized actions within applications, potentially leading to data theft or system compromise.

You can use Vulert's playground at Vulert Scanner to check if your application is affected without needing to sign up.

Yes, Vulert provides real-time monitoring for open-source vulnerabilities using just your package-lock.json file.

If an immediate update is not possible, consider removing the package and using alternatives until a secure version is available.

Detailed information about the vulnerability can be found on the GitHub repository linked in the vulnerability report.

How To Fix

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

npm uninstall generator-rollup

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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