Malicious Code Injection in weak_jellyfish_z3n Package
Summary
MAL-2025-92177: Malicious code in weak_jellyfish_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The weak_jellyfish_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, often with randomized names, to inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that compromises the integrity of the npm registry.
Vulnerability Detail
The vulnerability originates from the malicious intent behind the weak_jellyfish_z3n package, which modifies the package.json file to remove private flags and alters version numbers. It generates random package names, often themed around Indonesian culture, and continuously republishes these variants, leading to pollution of the npm registry. This behavior can result in developers unknowingly using compromised packages, which may lead to security breaches and loss of trust in the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall weak_jellyfish_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 weak_jellyfish_z3n package and instead look for alternative packages that provide similar functionality without the associated risks. Additionally, consider using tools like Vulert to monitor your package-lock.json for vulnerabilities.
Conclusion
The weak_jellyfish_z3n package poses a significant risk due to its malicious code that alters package metadata and repopulates the npm registry with compromised packages. It is crucial for developers to remove this package and monitor their dependencies for vulnerabilities to maintain the integrity of their applications.
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FAQ
The weak_jellyfish_z3n package is an npm package involved in the tea.xyz token reward campaign, which has been identified as containing malicious code.
The vulnerability can lead to the use of compromised packages, potentially resulting in security breaches and loss of trust in your application.
You should remove the weak_jellyfish_z3n package from your project and monitor for any updates or patches that may be released.
You can use Vulert, which monitors your package-lock.json for open-source vulnerabilities in real-time, alerting you to any issues.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
