Malicious Code Injection in jaja-jus19-breki: A Threat to npm Packages
Summary
MAL-2025-73628: Malicious code in jaja-jus19-breki (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The package jaja-jus19-breki is part of the npm ecosystem, which is widely used for JavaScript package management. This package has been identified as part of a malicious campaign that aims to exploit the npm registry by flooding it with derivative packages. These packages are designed to inflate developer reputation scores through automated scripts that generate and publish numerous variants with random names.
Vulnerability Detail
The vulnerability in jaja-jus19-breki originates from its association with the tea.xyz token reward campaign. It contains malicious scripts that modify the package.json file to remove private flags, alter version numbers, and create random package names. This behavior leads to the continuous republishing of these variants, which pollutes the npm registry and can potentially compromise the integrity of other packages relying on it.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall jaja-jus19-brekiIf 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 avoid using the jaja-jus19-breki package and monitor your dependencies for any malicious activity. Additionally, consider using tools like Vulert to monitor your package-lock.json for vulnerabilities without requiring access to the code or installation.
Conclusion
The jaja-jus19-breki package poses a significant threat to the npm ecosystem due to its malicious behavior. It is crucial for developers to be vigilant and remove any affected packages from their projects. Utilizing tools like Vulert can help in monitoring and alerting for such vulnerabilities in real-time.
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FAQ
jaja-jus19-breki is an npm package that has been identified as part of a malicious campaign to exploit the npm registry.
The vulnerability can lead to the pollution of the npm registry, potentially compromising the integrity of other packages and affecting your project's reliability.
You should uninstall the package immediately using the command: npm uninstall jaja-jus19-breki.
Yes, you can use Vulert to monitor your package-lock.json for vulnerabilities in real-time without needing to access the code or installation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
