Malicious Code Detected in cognito-auth-plugin: Security Alert

cognito-auth-plugin Updated 16 Jan 2026

Summary

16/01/2026
CRITICAL
No i
Critical
Not published

MAL-2026-277: Malicious code in cognito-auth-plugin (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The cognito-auth-plugin is an npm package designed to facilitate authentication with Amazon Cognito, providing developers with a streamlined way to integrate user sign-up, sign-in, and access control into their applications. However, this package has been identified as containing malicious code, posing significant security risks to applications that utilize it.

Vulnerability Detail

The vulnerability stems from the presence of malicious code within the cognito-auth-plugin package, as reported by Amazon Inspector. This code can potentially compromise the security of applications that depend on this package, leading to unauthorized access, data breaches, or other malicious activities. The issue affects all versions of the package starting from its introduction, making it critical for users to take immediate action.

How To Fix

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

npm uninstall cognito-auth-plugin

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

As a temporary workaround, developers can avoid using the cognito-auth-plugin package and implement custom authentication logic using AWS SDKs or other secure libraries until a safe alternative is identified.

Conclusion

The discovery of malicious code in the cognito-auth-plugin package poses a serious threat to applications that utilize it. Immediate action is required to mitigate risks by removing the package and implementing secure alternatives. Regular monitoring for vulnerabilities using tools like Vulert can help maintain application security.

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FAQ

The cognito-auth-plugin is an npm package that simplifies the integration of Amazon Cognito authentication into applications.

The malicious code was identified by Amazon Inspector, a security assessment service that helps identify vulnerabilities in applications.

Using the compromised cognito-auth-plugin can lead to unauthorized access to user data, data breaches, and potential exploitation of application vulnerabilities.

You can use Vulert, which monitors open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without any signup.

If you have already used the cognito-auth-plugin, it is crucial to remove it immediately and replace it with a secure alternative to protect your application.

How To Fix

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

npm uninstall cognito-auth-plugin

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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