Malicious Code Injection in daily_constrictor_z3n Package
Summary
MAL-2025-101184: Malicious code in daily_constrictor_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The daily_constrictor_z3n package is part of the npm ecosystem, typically used for various JavaScript functionalities. However, it has been identified as part of a malicious campaign that floods the npm registry with derivative packages. These packages are designed to inflate developer reputation scores through automated publishing scripts, which can lead to significant security risks.
Vulnerability Detail
The vulnerability originates from the daily_constrictor_z3n package, which contains malicious code that modifies the package.json file to remove private flags and changes version numbers. It generates random package names and continuously republishes these variants, polluting the npm registry. This behavior can lead to unauthorized access, reputation damage, and potential exploitation of affected systems.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall daily_constrictor_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 prevent the installation of the daily_constrictor_z3n package by using npm's package-lock.json to monitor dependencies. Ensure that your package-lock.json does not include this package, and regularly audit your dependencies.
Conclusion
The daily_constrictor_z3n package poses a significant security risk due to its malicious code that alters package configurations and republishing behaviors. It is crucial to remove this package and monitor your dependencies to maintain the integrity of your application.
See every vulnerability recorded for daily_constrictor_z3n →
FAQ
It is an npm package that has been identified as part of a malicious campaign to inflate developer reputation scores through automated publishing.
The malicious code modifies your package.json file, removes private flags, and can lead to unauthorized republishing of your packages, potentially compromising your application.
You should remove the daily_constrictor_z3n package from your project and monitor your dependencies for any unauthorized changes.
You can use tools like Vulert, which monitors your package-lock.json for open-source vulnerabilities in real-time without requiring code access or installation.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without signing up.
