Malicious Code Exploit in evolutionary_lark_z3n: A Threat to npm Packages
Summary
MAL-2025-94327: Malicious code in evolutionary_lark_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The package 'evolutionary_lark_z3n' 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 npm's publishing system. It is designed to generate and publish derivative packages with altered metadata, which can mislead developers and inflate reputation scores for token rewards.
Vulnerability Detail
The vulnerability originates from a malicious payload embedded within the 'evolutionary_lark_z3n' package. This payload modifies the package.json file to remove private flags, alters version numbers, and generates random package names, leading to the continuous republishing of these variants. This behavior not only pollutes the npm registry but also poses a risk to developers who may unknowingly use these compromised packages, potentially leading to security breaches in their applications.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall evolutionary_lark_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 avoid using the 'evolutionary_lark_z3n' package until a secure version is released. Additionally, consider using the following command to uninstall the package: npm uninstall evolutionary_lark_z3n.
Conclusion
The 'evolutionary_lark_z3n' package poses a significant threat due to its malicious code designed to exploit npm's publishing system. Developers are advised to take immediate action by updating or uninstalling the package and utilizing tools like Vulert for ongoing vulnerability monitoring.
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FAQ
It is an npm package that has been identified as part of a malicious campaign to exploit the npm publishing system.
The vulnerability can lead to the inclusion of malicious code in your application, potentially compromising its security.
You should uninstall the package immediately and check for any updates or patches that may be available.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using just your package-lock.json file.
You can use the Vulert playground at Vulert Scanner to check if your application is affected without any signup.
