Critical Malicious Code Vulnerability in esbuild-plugin-eta Package
Summary
MAL-2025-190840: Malicious code in esbuild-plugin-eta (npm). Affects esbuild-plugin-eta versions 0.1.1. No fix is published. How to fix ↓
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Background
esbuild-plugin-eta is an npm package that integrates the Eta templating engine with esbuild, allowing developers to use Eta templates in their build processes. This package is designed to enhance the development workflow by providing a seamless way to compile and serve Eta templates. However, it has been identified as containing malicious code, posing significant security risks to systems using it.
Vulnerability Detail
The vulnerability originates from the presence of malicious code embedded within the esbuild-plugin-eta package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive information, including secrets and keys. The malicious nature of the code is classified under CWE-506, indicating that it appears to be intentionally harmful. Users should consider any system with this package fully compromised and take immediate action to mitigate risks.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall esbuild-plugin-etaIf 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 affected package. It is advisable to look for alternative packages that provide similar functionality without the associated risks.
Conclusion
The esbuild-plugin-eta package has been identified as containing malicious code, posing serious security threats to any system using it. Immediate action is required to remove the package and secure any potentially compromised information. Regular monitoring of dependencies is essential to prevent similar vulnerabilities in the future.
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FAQ
You should immediately uninstall the package and rotate any sensitive information that may have been compromised.
You can use Vulert's playground at Vulert Scanner to check if your application is affected without needing to sign up.
Failing to remove the package can lead to unauthorized access to your system and exposure of sensitive data.
Regularly monitor your dependencies using tools like Vulert, which can alert you to open-source vulnerabilities in real-time.
Yes, you can report vulnerabilities to the package maintainers or through platforms like GitHub to help improve security.
