Malicious Code Vulnerability in metro-evaluator Package
Summary
MAL-2026-1792: Malicious code in metro-evaluator (npm). Affects metro-evaluator versions 1.0.0 – 1.0.3. No fix is published. How to fix ↓
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Background
The metro-evaluator package is a tool used in the Node.js ecosystem, primarily for evaluating Metro configurations in React Native applications. It offers developers a streamlined way to manage and optimize their Metro bundler settings. However, certain versions of this package have been found to contain malicious code, posing significant security risks to applications that rely on it.
Vulnerability Detail
The vulnerability identified in the metro-evaluator package involves the presence of malicious code that can compromise the integrity of applications using this package. This issue originates from specific versions (1.0.0 to 1.0.3) that were tampered with, allowing attackers to execute arbitrary code within the context of the application. The ramifications of this vulnerability can include unauthorized access to sensitive data, data corruption, and potential system compromise.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall metro-evaluatorIf 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 metro-evaluator package from your project if it is not essential. To do this, run the following command: npm uninstall metro-evaluator. Alternatively, consider using an alternative package that provides similar functionality without the associated risks.
Conclusion
The metro-evaluator package has been identified as containing malicious code in specific versions, posing a significant risk to applications. It is essential for developers to update to a secure version or consider alternative solutions to mitigate these risks. Regular monitoring for vulnerabilities using tools like Vulert can help maintain application security.
See every vulnerability recorded for metro-evaluator →
FAQ
Versions 1.0.0, 1.0.1, 1.0.2, and 1.0.3 of the metro-evaluator package are known to contain malicious code.
You can use Vulert to monitor and alert in real-time for open-source vulnerabilities. Visit Vulert Scanner to check if your application is affected without requiring any signup.
If immediate updates are not possible, consider removing the metro-evaluator package or using an alternative package until a secure version is available.
Using the affected versions can lead to unauthorized access to sensitive data, data corruption, and potential system compromise, which can severely impact your application's security.
More information can be found on the GitHub repository of the malicious packages, specifically at https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/metro-evaluator/MAL-2026-1792.json.
