Critical Malicious Code Vulnerability in @pergel/module-ui Package
Summary
MAL-2025-191287: Malicious code in @pergel/module-ui (npm). Affects @pergel/module-ui versions 0.0.9. No fix is published. How to fix ↓
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Background
The @pergel/module-ui package is an npm library designed for user interface components in web applications. It is widely used for its modular design and ease of integration. However, it has recently been compromised, exposing users to significant security risks due to malicious code embedded within the package.
Vulnerability Detail
The vulnerability originates from a compromise by the Sha1-Hulud: The Second Coming NPM worm, which infiltrated the @pergel/module-ui package. This malicious payload is designed to steal user tokens and credentials, subsequently publishing them to GitHub. Additionally, the worm can propagate itself to other npm packages owned by the user and establish persistence through GitHub actions. There is also a risk of the worm destroying the user's home directory, leading to potential data loss.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @pergel/module-uiIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, you can remove the @pergel/module-ui package from your project until a secure version is released. Use the following command to uninstall the package: npm uninstall @pergel/module-ui.
Conclusion
The @pergel/module-ui package has been compromised by a malicious worm that poses significant security risks to users. It is essential to take immediate action by updating or removing the package and monitoring for any unauthorized access to sensitive information. Utilizing tools like Vulert can help in identifying and mitigating such vulnerabilities in the future.
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FAQ
The malicious code is designed to steal sensitive user information, including tokens and credentials, and can also propagate to other npm packages.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If you have installed the compromised version of @pergel/module-ui, it is recommended to uninstall it immediately and monitor your accounts for any suspicious activity.
To prevent future vulnerabilities, regularly update your dependencies, use tools like Vulert to monitor for vulnerabilities, and review package sources before installation.
Failing to address this vulnerability could lead to unauthorized access to sensitive information, potential data loss, and further propagation of the malicious code to other packages.
