Malicious Code Detected in prompt-eng Package - Immediate Action Required

prompt-eng Updated 25 Nov 2025

Summary

24/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-190988: Malicious code in prompt-eng (npm). Affects prompt-eng versions 1.0.50. No fix is published. How to fix ↓

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Background

The prompt-eng package is an npm library designed for enhancing user prompts in JavaScript applications. It is commonly used for creating interactive command-line interfaces. However, a recent discovery has revealed that this package contains malicious code, posing a significant security risk to any system where it is installed.

Vulnerability Detail

The vulnerability originates from the prompt-eng package, specifically version 1.0.50, which has been identified to contain embedded malicious code. This code can compromise the integrity of the host system, allowing unauthorized access to sensitive information such as secrets and keys. Systems running this package should be considered fully compromised, and the potential ramifications include data theft, unauthorized control over the system, and further exploitation of the compromised environment.

How To Fix

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

npm uninstall prompt-eng

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

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Workaround

Currently, there are no effective workarounds to mitigate the risks associated with the malicious code in the prompt-eng package. The only recommended action is to remove the package entirely.

Conclusion

The discovery of malicious code in the prompt-eng package underscores the importance of vigilance in managing software dependencies. Immediate action is required to mitigate risks associated with this vulnerability, including the removal of the affected package and the rotation of sensitive information.

See every vulnerability recorded for prompt-eng →

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FAQ

Immediately remove the prompt-eng package from your system and rotate any sensitive information stored on that machine.

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Failure to address this vulnerability can lead to unauthorized access to your system, data theft, and potential exploitation by malicious actors.

Regularly audit your dependencies, use tools like Vulert for real-time monitoring, and stay updated on security advisories related to the packages you use.

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How To Fix

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

npm uninstall prompt-eng

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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