Critical Malicious Code Vulnerability in sinon-web3-chain Package
Summary
MAL-2026-896: Malicious code in sinon-web3-chain (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The sinon-web3-chain package is a JavaScript library used in Node.js applications for interacting with Ethereum blockchain networks. It provides developers with tools to simulate blockchain interactions and test smart contracts. However, this package has been compromised, leading to severe security risks for any system utilizing it.
Vulnerability Detail
The vulnerability stems from the presence of embedded malicious code within the sinon-web3-chain 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 this code poses a significant threat, as it can lead to data breaches and loss of control over the affected systems.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall sinon-web3-chainIf 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 →
Workaround
There are no effective workarounds for this vulnerability other than removing the package and securing your system. It is recommended to avoid using sinon-web3-chain until a clean, verified version is released.
Conclusion
The sinon-web3-chain package has been compromised with malicious code, posing significant security risks to any system using it. Immediate removal of the package and rotation of sensitive information is essential to mitigate these risks. Users are encouraged to utilize tools like Vulert to monitor for vulnerabilities in their applications.
See every vulnerability recorded for sinon-web3-chain →
FAQ
Immediately uninstall the package using 'npm uninstall sinon-web3-chain' and rotate any sensitive information stored on the affected system.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Keeping the package installed can lead to unauthorized access to your system, data breaches, and potential loss of sensitive information.
Currently, there is no patched version available. It is recommended to avoid using this package until a secure version is released.
Vulert monitors and alerts users in real-time for open-source vulnerabilities using just the package-lock.json file, making it easy to stay informed about potential risks.
