Malicious Code Injection in overseas_warbler-appteadev Package

overseas_warbler-appteadev Updated 18 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-106868: Malicious code in overseas_warbler-appteadev (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The overseas_warbler-appteadev package is part of the npm ecosystem, often utilized for various development tasks. However, it has been identified as part of a malicious campaign that aims to exploit npm's package management system. This package, like others in the campaign, is designed to inflate developer reputation scores through the automatic generation and publication of derivative packages.

Vulnerability Detail

The vulnerability stems from the package's malicious code, 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 to pollute the npm registry. This behavior can lead to significant security risks, including the potential for unauthorized access to sensitive data and the compromise of the integrity of the npm ecosystem.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall overseas_warbler-appteadev

If 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 overseas_warbler-appteadev package altogether and look for alternative packages that provide similar functionality without the associated risks.

Conclusion

The overseas_warbler-appteadev package poses a significant security risk due to its malicious code designed to manipulate npm's package management system. It is crucial for developers to remove this package and monitor their applications for vulnerabilities to maintain security and integrity.

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FAQ

It is an npm package that has been identified as part of a malicious campaign to inflate developer reputation scores.

The malicious code can compromise your application's integrity, leading to unauthorized access and potential data breaches.

You should uninstall the overseas_warbler-appteadev package immediately and check for any dependencies that may be affected.

Yes, you can use tools like Vulert, which monitors your package-lock.json file for open-source vulnerabilities in real-time.

Yes, you can use the Vulert playground at Vulert Scanner to check for vulnerabilities in your application without requiring any signup.

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How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall overseas_warbler-appteadev

If 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 →

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