
Mini Shai-Hulud: SAP CAP and mbt npm Packages Backdoored via Bun-Loaded Credential Stealer with Claude Code Persistence
A coordinated npm supply chain attack hit SAP’s Cloud Application Programming Model toolchain on April 29, 2026, branding itself “Mini Shai-Hulud.” Four packages totalling 570,000 weekly downloads were poisoned in a 2-hour window. The payload uses Bun as a runtime to evade Node.js detection, pulls 134 credential paths from infected hosts, dumps GitHub Actions runner memory, and persists through Claude Code SessionStart hooks and VS Code tasks.json folderOpen triggers. Over 1,197 victim repositories were live on GitHub within hours. Zero CVEs assigned.





