Critical Malicious Code Vulnerability in jquery-ajaxchimp Package

jquery-ajaxchimp Updated 21 Jan 2026

Summary

21/01/2026
CRITICAL
No i
Critical
Not published

MAL-2026-436: Malicious code in jquery-ajaxchimp (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

jquery-ajaxchimp is an npm package designed to facilitate the integration of Mailchimp with jQuery applications. It allows developers to easily manage subscriptions and handle form submissions. However, this package has been found to contain malicious code that compromises the security of any system where it is installed.

Vulnerability Detail

The vulnerability originates from the inclusion of malicious code in the jquery-ajaxchimp package, which has been identified as a significant security threat. Any system running this package is considered fully compromised, with potential unauthorized access to sensitive information such as secrets and keys. The malicious code can lead to severe ramifications, including data breaches and loss of control over the affected system.

How To Fix

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

npm uninstall jquery-ajaxchimp

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 available for this vulnerability other than removing the package entirely. It is essential to monitor your application for any signs of compromise after the removal.

Conclusion

The jquery-ajaxchimp package has been identified as containing malicious code that poses a significant security risk. Immediate action is required to uninstall the package and secure any sensitive information. Regular monitoring for vulnerabilities is recommended to maintain the security of your applications.

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FAQ

You should uninstall the jquery-ajaxchimp package immediately and rotate any sensitive information stored on the affected system.

You can use Vulert, which monitors open-source vulnerabilities in your software. By simply uploading your package-lock.json file, you can receive real-time alerts about vulnerabilities.

No, there is currently no patched version available for jquery-ajaxchimp. The only solution is to remove the package.

Failing to address this vulnerability can lead to unauthorized access to sensitive data, potential data breaches, and loss of control over your system.

You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.

Sponsored Lume, the Habilume companion Habilume Habit tracker with a companion that grows with you Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent. App Store Google Play

How To Fix

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

npm uninstall jquery-ajaxchimp

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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