Critical Malicious Code Vulnerability in @silgi/ratelimit Package
Summary
MAL-2025-191318: Malicious code in @silgi/ratelimit (npm). Affects @silgi/ratelimit versions 0.2.1. No fix is published. How to fix ↓
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Background
The @silgi/ratelimit package is an npm library designed to help developers implement rate limiting in their applications. It provides functionality to control the number of requests a user can make to a service within a specified timeframe. However, this package has been compromised, leading to severe security implications for users who have integrated it into their projects.
Vulnerability Detail
The vulnerability stems from a compromise by the Sha1-Hulud: The Second Coming NPM worm, which has infected the @silgi/ratelimit package. This malicious code is designed to steal sensitive tokens and credentials from users and subsequently publish them to GitHub. Furthermore, the worm can propagate itself to other NPM packages owned by the user and establish persistence through a GitHub action. There is also a risk that the worm may destroy the user's home directory, leading to data loss.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @silgi/ratelimitIf 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 @silgi/ratelimit package from their project by executing: npm uninstall @silgi/ratelimit. This will prevent the malicious code from executing until a safe version is available.
Conclusion
The @silgi/ratelimit package has been compromised by a malicious worm that poses significant risks to users. Immediate action is required to mitigate these risks, including updating or removing the package. Utilizing tools like Vulert can help monitor for such vulnerabilities in the future.
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FAQ
The malicious code is designed to steal sensitive tokens and credentials from users and publish them to GitHub.
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You should immediately uninstall the @silgi/ratelimit package and monitor your system for any unauthorized access or changes.
Regularly monitor your dependencies using tools like Vulert and keep your packages updated to the latest secure versions.
Failure to address this vulnerability could lead to unauthorized access to sensitive information, data loss, and further propagation of the malicious code.
