Critical Malicious Code Vulnerability in @axinom/mosaic-cli Package

@axinom/mosaic-cli Updated 25 Nov 2025

Summary

25/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-191450: Malicious code in @axinom/mosaic-cli (npm). Affects @axinom/mosaic-cli versions 0.52.0-rc.2. No fix is published. How to fix ↓

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Background

The @axinom/mosaic-cli package is a command-line interface tool designed for managing and deploying mosaic applications. It is widely used in various development environments due to its ease of use and integration capabilities. However, recent findings have revealed that this package contains malicious code, posing significant security risks to users and their systems.

Vulnerability Detail

The vulnerability stems from the presence of embedded malicious code within version 0.52.0-rc.2 of the @axinom/mosaic-cli 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, indicating that it appears to be intentionally harmful. Users are advised to treat any system running this package as fully compromised, as the removal of the package may not eliminate all traces of the malicious software.

How To Fix

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

npm uninstall @axinom/mosaic-cli

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

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Workaround

Currently, there are no effective workarounds to mitigate the risks posed by this vulnerability other than removing the package and securing your system.

Conclusion

The discovery of malicious code in the @axinom/mosaic-cli package poses a serious threat to users and their systems. Immediate action is required to uninstall the package and secure any compromised information. Regular monitoring and using tools like Vulert can help prevent future vulnerabilities.

See every vulnerability recorded for @axinom/mosaic-cli →

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FAQ

You should immediately uninstall the package using the command npm uninstall @axinom/mosaic-cli and rotate any sensitive information stored on your system.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.

Failing to address this vulnerability could lead to unauthorized access to your system, data breaches, and potential loss of sensitive information.

After removing the package, you should rotate all secrets and keys and conduct a thorough security audit of your system to ensure no malicious software remains.

If a patched version is released, updating to that version will be necessary. However, simply updating may not remove the malicious code if it has already executed.

How To Fix

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

npm uninstall @axinom/mosaic-cli

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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