Critical Malicious Code Vulnerability in transform-jscript Package

transform-jscript Updated 18 Mar 2026

Summary

18/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1505: Malicious code in transform-jscript (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The transform-jscript package is a JavaScript transformation tool commonly used in Node.js applications. It allows developers to manipulate and transform JavaScript code for various purposes, such as code optimization and compatibility adjustments. However, this package has been identified to contain malicious code, posing significant security risks to any system utilizing it.

Vulnerability Detail

The vulnerability originates from the presence of embedded malicious code within the transform-jscript package. This code can compromise the entire system on which the package is installed, potentially allowing unauthorized access to sensitive information, including secrets and keys. The malicious nature of this code is classified under CWE-506, indicating that it appears to be intentionally harmful. Systems running this package should be considered fully compromised, and immediate action is required to mitigate the risks.

How To Fix

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

npm uninstall transform-jscript

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

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Workaround

There are no effective workarounds for this vulnerability. The only recommended action is to remove the package entirely and secure your system.

Conclusion

The transform-jscript package has been identified as containing malicious code, posing serious security risks to systems that utilize it. Immediate removal of the package and rotation of sensitive information is essential to mitigate potential damage. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.

See every vulnerability recorded for transform-jscript →

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FAQ

You should remove the transform-jscript package immediately and rotate any secrets or keys stored on the affected system.

You can use Vulert's playground at Vulert Scanner to check if your application is affected without requiring any signup.

Failing to address this vulnerability can lead to unauthorized access to sensitive data, system compromise, and potential data breaches.

Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities using just your package-lock.json file.

CWE-506 indicates that the product contains code that appears to be malicious in nature, highlighting the severity of the threat posed by this vulnerability.

How To Fix

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

npm uninstall transform-jscript

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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