Malicious Code Injection in tiny_sailfish_z3n: A Threat to npm Packages
Summary
MAL-2025-97020: Malicious code in tiny_sailfish_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The tiny_sailfish_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package is suspected to be involved in a token reward campaign that has led to the proliferation of malicious packages on npm. Its functionality is compromised by the presence of malicious scripts that manipulate package metadata, posing a risk to developers and users alike.
Vulnerability Detail
The vulnerability stems from the presence of malicious code within the tiny_sailfish_z3n package. This code is designed to automatically modify the package.json file by removing private flags, altering version numbers, and generating random package names. The malicious payload aims to inflate developer reputation scores through the creation and republishing of derivative packages, which can lead to pollution of the npm registry and potential exploitation of unsuspecting users.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall tiny_sailfish_z3nIf 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 tiny_sailfish_z3n package from your project by executing the command: npm uninstall tiny_sailfish_z3n. This will prevent any malicious code from executing until a secure version is available.
Conclusion
The tiny_sailfish_z3n package poses a significant security risk due to its malicious code designed to manipulate package metadata. It is essential for developers to take immediate action by updating or removing the package and to implement monitoring tools like Vulert to safeguard their projects against future vulnerabilities.
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FAQ
tiny_sailfish_z3n is an npm package that has been identified as containing malicious code aimed at manipulating package metadata and inflating developer reputation scores.
The malicious code can alter your package.json file, remove private flags, and create numerous derivative packages, which can lead to security vulnerabilities and pollution of the npm registry.
If you have installed tiny_sailfish_z3n, it is recommended to uninstall the package immediately and check for any updates or patches that may address the vulnerability.
You can use tools like Vulert, which monitors your package-lock.json file to alert you in real-time about open-source vulnerabilities in your software. You can also check your application for vulnerabilities using the Vulert playground without any signup.
To prevent future vulnerabilities, regularly update your dependencies, use trusted sources for packages, and consider employing automated security scanning tools.
