Malicious Code Injection in superb_silverfish_z3n: A Threat to npm Packages
Summary
MAL-2025-96870: Malicious code in superb_silverfish_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The superb_silverfish_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package appears to be associated with a token reward campaign that has led to the proliferation of malicious packages in the npm registry. Its primary function is to facilitate the distribution of software, but it has been compromised to include harmful scripts that manipulate package metadata.
Vulnerability Detail
The vulnerability in superb_silverfish_z3n originates from its design to automatically generate and publish derivative packages with randomized names. This malicious behavior includes modifying the package.json file to remove private flags, altering version numbers, and continuously republishing variants to pollute the npm registry. The implications of this vulnerability are significant, as it can lead to the misuse of developer reputation scores and the potential distribution of harmful software to unsuspecting users.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall superb_silverfish_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, you can prevent the installation of this malicious package by using npm's package-lock.json to monitor dependencies. Ensure that your project does not include superb_silverfish_z3n in its dependencies.
Conclusion
The superb_silverfish_z3n package poses a significant threat due to its malicious code that alters package metadata and inflates developer reputation scores. It is crucial for developers to remove this package from their projects and utilize tools like Vulert to monitor for vulnerabilities in real-time.
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FAQ
superb_silverfish_z3n is an npm package that has been identified as malicious, designed to manipulate package metadata and inflate developer reputation scores.
This vulnerability can lead to the installation of harmful software, manipulation of your project's dependencies, and potential damage to your developer reputation.
You should immediately uninstall the superb_silverfish_z3n package using the command: npm uninstall superb_silverfish_z3n.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using just your package-lock.json file. You can check your application for vulnerabilities using the Vulert playground at Vulert Scanner.
Regularly audit your dependencies, use tools like Vulert for monitoring, and stay updated on security advisories related to the packages you use.
