Malicious Code Injection in jelek-ras-batub: A Threat to npm Users
Summary
MAL-2025-157033: Malicious code in jelek-ras-batub (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 'jelek-ras-batub' is part of a series of malicious npm packages associated with the tea.xyz token reward campaign. These packages are designed to manipulate the npm registry by automatically generating and publishing derivative packages with randomized names. This behavior aims to inflate developer reputation scores for token rewards, posing a significant risk to the integrity of the npm ecosystem.
Vulnerability Detail
The vulnerability in 'jelek-ras-batub' originates from its malicious payload, which modifies the package.json file to remove private flags and alters version numbers. It generates random package names, primarily themed around Indonesian culture, and continuously republishes these variants to pollute the npm registry. This not only compromises the security of the affected packages but also affects the overall trustworthiness of the npm ecosystem, leading to potential exploitation by malicious actors.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall jelek-ras-batubIf 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 'jelek-ras-batub' package and monitor your package-lock.json file for any unauthorized changes. If you suspect that your project has been compromised, consider reverting to a previous version of your project before the installation of this package.
Conclusion
The 'jelek-ras-batub' package poses a significant threat to npm users due to its malicious behavior of modifying package files and flooding the npm registry. It is essential to uninstall this package and monitor your project for any vulnerabilities to maintain the integrity of your software.
See every vulnerability recorded for jelek-ras-batub →
FAQ
The 'jelek-ras-batub' package is a malicious npm package that is part of a campaign to inflate developer reputation scores through the automatic generation of derivative packages.
This vulnerability can compromise the integrity of your project by introducing malicious code that modifies your package.json file and floods the npm registry with unauthorized packages.
You should immediately uninstall the package using 'npm uninstall jelek-ras-batub' and review your project for any unauthorized changes.
You can use tools like Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time without requiring code access or installation.
Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
