Critical Malicious Code Vulnerability in formmiderable Package

formmiderable Updated 02 Mar 2026

Summary

02/03/2026
CRITICAL
No i
Critical
Not published

MAL-2026-1107: Malicious code in formmiderable (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The formmiderable package is an npm library designed to facilitate form handling in web applications. It provides developers with tools to manage form submissions and validations efficiently. However, this package has been identified as containing malicious code, posing significant security risks to any system utilizing it.

Vulnerability Detail

The vulnerability stems from the presence of embedded malicious code within the formmiderable package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive data such as secrets and keys. The origin of this vulnerability is linked to a malicious actor who has injected harmful code into the package, making it a severe threat to users and their systems.

How To Fix

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

npm uninstall formmiderable

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 →

Workaround

Currently, there are no workarounds that can mitigate the risks associated with this vulnerability. The only effective action is to uninstall the compromised package and secure your system.

Conclusion

The formmiderable package has been identified as containing malicious code that poses a serious security threat. Immediate action is required to uninstall the package and secure any sensitive information. Users are encouraged to utilize tools like Vulert to monitor their applications for vulnerabilities.

See every vulnerability recorded for formmiderable →

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FAQ

formmiderable is an npm library used for handling form submissions and validations in web applications.

The malicious code can compromise your system, allowing unauthorized access to sensitive information and potentially leading to data breaches.

You should uninstall the formmiderable package immediately and rotate any secrets or keys stored on the affected system.

No, there is currently no patched version available. The only solution is to remove the package entirely.

You can use Vulert, a tool that monitors and alerts for open-source vulnerabilities in your software by analyzing your package-lock.json file. You can check for vulnerabilities in your application using the Vulert playground without any signup.

How To Fix

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

npm uninstall formmiderable

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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