Critical Malicious Code Vulnerability in simple-string-utils3 Package
Summary
MAL-2026-233: Malicious code in simple-string-utils3 (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The simple-string-utils3 package is a utility library available on npm that provides string manipulation functions. It is commonly used in JavaScript applications for tasks such as formatting and parsing strings. However, this package has been compromised, embedding malicious code that poses significant security risks to any system utilizing it.
Vulnerability Detail
The vulnerability stems from the presence of embedded malicious code within the simple-string-utils3 package. This code can fully compromise any computer that has the package installed, allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of the code means that simply removing the package may not eliminate all traces of the compromise, as full control of the affected system 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 simple-string-utils3If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, consider using alternative packages for string manipulation, such as 'lodash' or 'string.js', which do not have known vulnerabilities. You can install lodash using the command: 'npm install lodash'.
Conclusion
The simple-string-utils3 package contains malicious code that poses a severe security risk. Immediate action is required to remove the package and secure any sensitive information. Users are encouraged to explore alternative libraries for string manipulation and utilize tools like Vulert to monitor for vulnerabilities.
See every vulnerability recorded for simple-string-utils3 →
FAQ
The malicious code can compromise the entire system, allowing unauthorized access to sensitive data.
You can use Vulert's playground at Vulert Scanner to check if your application is affected without requiring any signup.
After removal, rotate all secrets and keys stored on the affected computer from a secure system.
No, there is currently no patched version available for this package.
Consider using packages like 'lodash' or 'string.js' as alternatives for string manipulation tasks.
