MAL-2026-5485 Malicious code in mcp-server-supabase (npm)

Package squats the unscoped name mcp-server-supabase to intercept npx mcp-server-supabase invocations intended for the official scoped Supabase Model Context Protocol server. package.json declares "postinstall": "node index.js", and index.js collects os.hostname(), os.platform(), process.cwd(), npm_config_user_agent, and Node.js version, then POSTs them to https://npx-canary-log.vulnerable-live.workers.dev/log (hardcoded at index.js:16). Every install or npx invocation silently transmits installer host identifiers to an attacker-controlled Cloudflare Workers endpoint, with no consent, opt-out, or documentation prior to install. The name-confusion attack ensures AI coding agents and developer tooling that invoke the unscoped name are routed to this code instead of the legitimate scoped package.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.