Critical Malicious Code Vulnerability in tellyo-colours Package

tellyo-colours Updated 21 Oct 2026

Summary

20/10/2026
CRITICAL
No i
Critical
Not published

MAL-2026-18115: Malicious code in tellyo-colours (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The tellyo-colours package is an npm library designed for managing color palettes and themes in web applications. It is commonly used by developers to streamline the process of color selection and application styling. However, this package has been compromised, leading to severe security implications for any system utilizing it.

Vulnerability Detail

The vulnerability stems from the presence of malicious code embedded within the tellyo-colours package. This code can compromise any computer that has the package installed, allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of this code is classified under CWE-506, which indicates that the product contains code that appears to be malicious. Users should be aware that simply removing the package may not eliminate all traces of the malicious software, as full control of the affected computer may have been granted to an external entity.

How To Fix

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

npm uninstall tellyo-colours

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

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Workaround

There are no specific workarounds available for this vulnerability. The best course of action is to uninstall the package and secure your system.

Conclusion

The tellyo-colours 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. Utilizing tools like Vulert can help in monitoring for such vulnerabilities in the future.

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FAQ

You should uninstall the package immediately and rotate any sensitive information stored on your system.

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Keeping the package can lead to unauthorized access to your system and potential data breaches, as the malicious code can compromise your sensitive information.

Regularly monitor your dependencies using tools like Vulert, which can alert you to open-source vulnerabilities in real-time.

Vulert monitors and alerts for open-source vulnerabilities using just the package-lock.json file, allowing you to maintain the security of your applications without requiring code access.

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How To Fix

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

npm uninstall tellyo-colours

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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