Critical Malicious Code Vulnerability in ethres Package

ethres Updated 20 Feb 2026

Summary

20/02/2026
CRITICAL
No i
Critical
Not published

MAL-2026-958: Malicious code in ethres (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The ethres package is a JavaScript library available on npm, primarily used for interacting with Ethereum blockchain functionalities. It is designed to facilitate developers in building decentralized applications (dApps) by providing essential tools and APIs. However, this package has been compromised, embedding malicious code that poses significant security risks to any system utilizing it.

Vulnerability Detail

The vulnerability stems from the presence of malicious code within the ethres package, identified as GHSA-56j5-62q9-cj2c. This code can fully compromise any computer that has the package installed, allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of this code is classified under CWE-506, indicating that it contains embedded malicious code that can lead to severe security breaches.

How To Fix

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

npm uninstall ethres

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

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Workaround

There are no specific workarounds for this vulnerability other than removing the package and securing your environment. Ensure that you monitor your system for any signs of compromise after the removal.

Conclusion

The ethres package has been identified as containing malicious code that can compromise systems. Immediate removal of the package and rotation of sensitive information is essential to mitigate risks. Users are encouraged to utilize tools like Vulert for ongoing monitoring of vulnerabilities in their projects.

See every vulnerability recorded for ethres →

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FAQ

The ethres package is a JavaScript library used for Ethereum blockchain interactions, aiding developers in building decentralized applications.

If you have the ethres package installed, your system is likely affected. You should remove it immediately and check for any unauthorized access.

After removal, rotate all secrets and keys stored on the affected system from a secure device to prevent unauthorized access.

Yes, you can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities using just your package-lock.json file. You can check for vulnerabilities using the Vulert playground without signing up.

It is highly recommended to avoid using ethres due to its compromised nature. Look for alternative packages that provide similar functionality without security risks.

How To Fix

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

npm uninstall ethres

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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