Critical Malicious Code Vulnerability in knot-date-utils-rb Package

knot-date-utils-rb Updated 13 May 2026

Summary

13/05/2026
CRITICAL
No i
Critical
Not published

MAL-2026-3631: Malicious code in knot-date-utils-rb (RubyGems). Affects knot-date-utils-rb versions 1.0.0. No fix is published. How to fix ↓

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Background

The knot-date-utils-rb package is a RubyGems library designed to assist developers with date and time utilities in Ruby applications. It is widely used in various Ruby projects for its simplicity and effectiveness in handling date manipulations. However, this package has been identified as part of a malicious cluster that compromises user credentials and system integrity.

Vulnerability Detail

The vulnerability stems from the knot-date-utils-rb package being part of a malicious cluster associated with Go BufferZoneCorp and RubyGems knot-theory. This malicious code can steal user credentials, establish unauthorized SSH access, and alter build or workflow environment variables, leading to severe security breaches and potential data loss.

How To Fix

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

bundle remove knot-date-utils-rb

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

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Workaround

As a temporary workaround, you can remove the knot-date-utils-rb package from your project until a secure version is released. You can do this by running the command: 'gem uninstall knot-date-utils-rb'. Additionally, consider using alternative date utility libraries that do not have known vulnerabilities.

Conclusion

The knot-date-utils-rb package has been identified as containing malicious code that poses serious security risks. It is essential for developers using this package to take immediate action by updating or removing it to protect their applications from potential breaches.

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FAQ

knot-date-utils-rb is a RubyGems library that provides utilities for handling dates and times in Ruby applications.

This vulnerability can lead to unauthorized access to your system, theft of credentials, and manipulation of your application's environment, posing significant security risks.

Yes, it is recommended to check for a patched version of the knot-date-utils-rb package and update it as soon as possible.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just a manifest file like package-lock.json. You can also check your application against known vulnerabilities using the Vulert playground.

If you are using the knot-date-utils-rb package, it is crucial to either update to a patched version or remove the package until a secure version is available.

How To Fix

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

bundle remove knot-date-utils-rb

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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