Critical Malicious Code Vulnerability in zod-js Package
Summary
MAL-2026-346: Malicious code in zod-js (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The zod-js package is a JavaScript library used for schema validation, allowing developers to define and validate data structures in their applications. It is widely utilized in Node.js environments for ensuring data integrity and type safety. However, the package has been compromised, leading to severe security risks for any system that has it installed.
Vulnerability Detail
The vulnerability stems from the presence of malicious code embedded within the zod-js package. This code can fully compromise any computer running the package, allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of the code is classified under CWE-506, indicating that it appears to be intentionally harmful. Users are advised to treat any system with this package as 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 zod-jsIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, if you must continue using functionality similar to zod-js, consider using alternative schema validation libraries that are known to be secure, such as Joi or Yup, until the issue with zod-js is resolved.
Conclusion
The zod-js package has been identified as containing malicious code that poses significant security risks. Users are strongly advised to remove the package and secure their systems. Monitoring tools like Vulert can help keep your dependencies safe from future vulnerabilities.
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FAQ
Immediately remove the zod-js package from your system and rotate all sensitive information stored on that computer.
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Failure to address this vulnerability could lead to unauthorized access to sensitive data, potentially resulting in data breaches or system compromises.
Currently, there is no patch available. Users are advised to remove the package until a secure version is released.
You can use tools like Vulert, which monitors your package-lock.json file to alert you in real-time for open-source vulnerabilities in your software.
