Malicious Code Injection in testy_capybara_z3n Package
Summary
MAL-2025-96973: Malicious code in testy_capybara_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The testy_capybara_z3n package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores. However, it has been identified as containing malicious code that compromises the integrity of the npm registry.
Vulnerability Detail
The vulnerability in the testy_capybara_z3n package stems from its malicious payload that modifies the package.json file. It removes private flags, alters version numbers, and generates random package names, leading to the continuous republishing of variants. This behavior not only pollutes the npm registry but also poses a risk to developers who may unknowingly use these compromised packages. The origin of this vulnerability is linked to the tea.xyz token reward campaign, which incentivizes the creation of such malicious packages.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall testy_capybara_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 testy_capybara_z3n package by using npm's package-lock.json file to lock your dependencies. Additionally, consider using Vulert to monitor your project for vulnerabilities. You can check if your application is affected by this vulnerability using the Vulert playground at https://vulert.com/scanner without any signup.
Conclusion
The testy_capybara_z3n package contains a serious vulnerability that can compromise your project's integrity. It is essential to uninstall this package and monitor your dependencies for any potential threats. Utilizing tools like Vulert can help you stay informed about vulnerabilities in your open-source software.
See every vulnerability recorded for testy_capybara_z3n →
FAQ
The testy_capybara_z3n package is an npm package associated with the tea.xyz token reward campaign, designed to automate the generation and publication of packages.
The vulnerability can lead to the pollution of the npm registry and may compromise the integrity of your project by introducing malicious code.
You should uninstall the testy_capybara_z3n package immediately and check for any dependencies that may rely on it.
Yes, you can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities using just the package-lock.json file.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
