Critical Malicious Code Vulnerability in json-mapping-source Package
Summary
MAL-2026-725: Malicious code in json-mapping-source (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The json-mapping-source package is a library used in Node.js applications for mapping JSON data structures. It is commonly utilized in various projects for data transformation and manipulation. However, this package has been found to contain malicious code, posing significant security risks to any application that integrates it.
Vulnerability Detail
The vulnerability originates from the inclusion of malicious code within the json-mapping-source package. This code can compromise the entire system where the package is 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 embeds harmful functionalities that can lead to severe security breaches.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall json-mapping-sourceIf 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 isolate the application from the internet and limit access to sensitive data until the package is removed and the system is secured. Additionally, consider using alternative packages that provide similar functionality without the associated risks.
Conclusion
The json-mapping-source package has been identified as containing malicious code, which poses a significant risk to any system using it. Immediate action is required to remove the package and secure any compromised data. Utilizing tools like Vulert can help monitor for such vulnerabilities in the future.
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FAQ
Immediately remove the json-mapping-source package from your project and rotate any secrets or keys that may have been compromised.
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Failing to address this vulnerability can lead to unauthorized access to sensitive data, complete system compromise, and potential data breaches.
Yes, tools like Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just the package-lock.json file.
While many packages on npm are safe, it is essential to regularly audit your dependencies and stay informed about vulnerabilities to mitigate risks.
