Malicious Code Injection in kosan-app: A Threat to npm Ecosystem
Summary
MAL-2025-98011: Malicious code in kosan-app (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The kosan-app package is part of the npm ecosystem, which is widely used for JavaScript development. It is designed to facilitate various functionalities within applications. However, this package has been compromised, making it susceptible to malicious activities that can affect developers and users alike.
Vulnerability Detail
The vulnerability originates from a malicious payload embedded within the kosan-app package. This payload modifies the package.json file by removing private flags, altering version numbers, and generating random package names. It is part of a broader scheme associated with the tea.xyz token reward campaign, which aims to inflate developer reputation scores through the automatic generation and publication of derivative packages. The ramifications include potential exposure of sensitive data, pollution of the npm registry, and disruption of the development workflow.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall kosan-appIf 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 remove the kosan-app package from your project by executing: npm uninstall kosan-app. This will prevent any malicious code from executing until a secure version is available.
Conclusion
The kosan-app package has been identified as containing malicious code that poses a significant risk to users and developers within the npm ecosystem. It is crucial to take immediate action by updating or removing the package to safeguard your applications.
See every vulnerability recorded for kosan-app →
FAQ
The malicious code modifies package.json to remove private flags and changes version numbers, allowing for unauthorized republishing of the package.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any signup.
Using the compromised package can lead to data exposure, reputation damage, and disruption of the development process due to the pollution of the npm registry.
Regularly updating packages, using tools like Vulert for real-time monitoring, and conducting security audits can help prevent vulnerabilities.
If immediate updates are not possible, consider removing the package from your project as a temporary measure to mitigate risks.
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Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
