Malicious Code Detected in @upstashed/context7-mcp Package - Security Alert
Summary
MAL-2026-1642: Malicious code in @upstashed/context7-mcp (npm). Affects @upstashed/context7-mcp versions 1.0.2. No fix is published. How to fix ↓
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Background
The @upstashed/context7-mcp package is a Node.js library designed for managing context in applications. It provides developers with tools to efficiently handle state and context management in their applications. However, this package has been identified to contain malicious code, posing a significant security risk to users who integrate it into their projects.
Vulnerability Detail
The vulnerability stems from the presence of malicious code within version 1.0.2 of the @upstashed/context7-mcp package. This code can potentially compromise the security of applications using this package, leading to unauthorized access, data breaches, or other malicious activities. The origin of this vulnerability is linked to the package being flagged by security researchers from ReversingLabs, who have documented its malicious nature.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @upstashed/context7-mcpIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, consider removing the @upstashed/context7-mcp package from your project until a secure version is released. You can do this by running: npm uninstall @upstashed/context7-mcp. Additionally, monitor your application for any unusual behavior that may indicate exploitation of this vulnerability.
Conclusion
The @upstashed/context7-mcp package has been identified as containing malicious code, posing a significant risk to applications that utilize it. Users are advised to uninstall the package and monitor their applications for any unusual activity. Stay informed about updates and patches to ensure the security of your software.
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FAQ
The malicious code can lead to unauthorized access to sensitive data, potential data breaches, and compromise the integrity of applications using this package.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
Currently, there is no patched version available for the @upstashed/context7-mcp package. It is recommended to remove the package until a secure version is released.
If you have integrated the @upstashed/context7-mcp package, it is crucial to uninstall it immediately and monitor your application for any signs of compromise.
The vulnerability was reported by ReversingLabs, a security research organization that specializes in identifying malicious packages.
