npm malware targeting Claude users leaks own GitHub token, reaches 676 downloads
By
Jessica Lyons
Crusty in the right places. Worth the chew.
Summary
An npm package called "mouse5212-super-formatter" targeting Claude users acted as information-stealing malware, reaching 676 downloads before removal. The AI-generated malware made a critical error by leaking its own GitHub private token, allowing OX Security researchers to trace stolen files and analyze the threat. Researchers warn that more threat actors will upload sloppy malware mimicking APT groups as supply chain attacks increase.
Key quotes
· 1 pulledWe're going to see more threat actors getting into the game – uploading more sloppy malwares, mostly mimicking APT groups to get a slice of the cake until npm st
You might also wanna read
Major NPM Supply Chain Attack: @ctrl/tinycolor and 40+ Packages Compromised with Self-Propagating Malware
A sophisticated supply chain attack has compromised the popular @ctrl/tinycolor NPM package (with over 2 million weekly downloads) along wit
GitHub Issue Prompt Injection Leads to 4,000 Developer Machines Compromised via Malicious npm Package
A sophisticated supply chain attack compromised approximately 4,000 developer machines through a GitHub issue title prompt injection. The at
317 npm Packages Compromised in Mini Shai-Hulud Supply Chain Attack
A major npm supply chain attack occurred on May 19, 2026, when the npm account of maintainer "atool" was compromised. The attacker published
GitLab Identifies Large-Scale npm Supply Chain Attack with Destructive Malware
GitLab's security researchers have uncovered a large-scale supply chain attack in the npm ecosystem involving a destructive malware variant
Popular npm packages debug and chalk compromised with crypto-intercepting malware
Starting September 8th, 2023, the popular npm packages "debug" and "chalk" were compromised with malicious code. These packages, which colle
aikido.dev·8mo agoNx Build Kit Security Breach: Malware Steals Wallets and Credentials via GitHub Repositories
A security breach has been discovered in the popular Nx build kit where malicious post-install commands create unauthorized repositories nam
