Malicious npm Package Brand-Squats TanStack to Exfiltrate Environment Variables

The Socket Research Team has detected an active supply-chain attack targeting the unscoped tanstack package on npm, a brand-squatted impersonation of the legitimate @tanstack/* organization. Beginning today, the package's maintainer (sh20raj) began pushing malicious versions that silently steal environment variable files, including .env, .env.local, and .env.production, from developers' machines at install time, exfiltrating them to an attacker-controlled endpoint. Versions 2.0.4 through 2.0.7…