Malicious Code Injection in resonant_bat_z3n Package - npm Vulnerability
Summary
MAL-2025-107943: Malicious code in resonant_bat_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 resonant_bat_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package, like many others, is intended to facilitate the development and deployment of applications by providing reusable code. However, it has been identified as part of a malicious campaign that aims to manipulate the npm registry, impacting developers and users alike.
Vulnerability Detail
The vulnerability originates from the resonant_bat_z3n package, which is associated with the tea.xyz token reward campaign. This package contains scripts designed to automatically generate and publish derivative packages with randomized names, thereby inflating developer reputation scores for token rewards. The malicious payload modifies the package.json file to remove private flags, alters version numbers, and continuously republishes variants, leading to pollution of the npm registry and potential security risks for users.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall resonant_bat_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, consider using a package-lock.json file to lock your dependencies to specific versions, preventing the installation of the malicious package. You can also monitor your dependencies using tools like Vulert, which alerts you in real-time for open-source vulnerabilities.
Conclusion
The resonant_bat_z3n package poses a significant risk due to its malicious code designed to manipulate the npm registry. It is crucial for developers to remove this package and monitor their dependencies to maintain the security and integrity of their applications.
See every vulnerability recorded for resonant_bat_z3n →
FAQ
The resonant_bat_z3n package is an npm package that has been identified as part of a malicious campaign to manipulate the npm registry.
This vulnerability can lead to the pollution of the npm registry, potentially affecting the integrity and security of your application by introducing malicious code.
You should uninstall the resonant_bat_z3n package immediately and monitor your project for any other malicious packages.
You can use tools like Vulert, which allows you to monitor and alert for open-source vulnerabilities in your software without requiring access to the code.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
