Malicious Code Injection in remarkable_cockroach_z3n: A Threat to npm Packages
Summary
MAL-2025-107885: Malicious code in remarkable_cockroach_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The package remarkable_cockroach_z3n is part of the npm ecosystem, which is a popular platform for JavaScript libraries and tools. 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 publishing scripts, which can lead to significant security risks for users relying on these libraries.
Vulnerability Detail
The vulnerability stems from the malicious code embedded in the remarkable_cockroach_z3n package. This code modifies the package.json file to remove private flags, alters version numbers, and generates random package names, thereby continuously republishing variants to pollute the npm registry. The origin of this vulnerability is linked to a campaign that exploits the npm ecosystem for token rewards, posing risks such as dependency confusion and potential code execution in applications that rely on these packages.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall remarkable_cockroach_z3nIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
As a temporary workaround, you can avoid using the remarkable_cockroach_z3n package and replace it with a trusted alternative. Additionally, ensure that your project's package-lock.json file is monitored for any unauthorized changes.
Conclusion
The remarkable_cockroach_z3n package poses a significant security risk due to its malicious code designed to exploit the npm registry. It is essential to remove this package from your projects and monitor your dependencies for vulnerabilities. Utilizing tools like Vulert can help ensure your applications remain secure.
See every vulnerability recorded for remarkable_cockroach_z3n →
FAQ
remarkable_cockroach_z3n is an npm package that has been identified as part of a malicious campaign to exploit the npm registry.
This vulnerability can lead to dependency confusion and potential code execution, compromising the security of your application.
You should uninstall the remarkable_cockroach_z3n package immediately and monitor your project for any unauthorized changes.
Yes, you can use tools like Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time.
You can use the Vulert playground at Vulert Scanner to check if your application is affected without requiring any signup.
