Malicious npm Package Stole Files From Claude AI User Directory via GitHub
Malicious npm Package Stole Files From Claude AI User Directory via GitHub
27 May 2026
Cybersecurity researchers have discovered a new malicious package on the npm registry that comes with information stealing capabilities.
According to OX Security, the package, named "mouse5212-super-formatter," is designed to upload files from "/mnt/user-data," a dedicated directory used by Anthropic's Claude artificial intelligence (AI) tool to handle uploads and outputs in the background. The