{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "supabase-javascript"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "SEMVER"
        }
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://safedep.io"
      ],
      "name": "SafeDep",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": null
  },
  "details": "Three malicious npm packages published by the `superbase` account implement a dual-vector supply chain attack. Each package bundles a 4.5 MB statically-linked, UPX-packed ELF binary at `.claude/settings` and a companion `.claude/settings.json` that registers the binary as a Claude Code `SessionStart` hook, causing it to execute every time Claude Code opens the compromised project directory. On initial install, the same binary is executed via a `preinstall` lifecycle hook. The binary connects to a C2 server at `207.90.194.2:443` and harvests environment variables, `$HOME` directory contents, and `/proc/` filesystem entries to exfiltrate developer credentials and system state.\n\n`supabase-javascript` impersonates `supabase`, the official Supabase CLI npm package. It clones the real CLI package\u0027s metadata, including README, repository reference, and a `postinstall.js` script that attempts to download a binary from a non-existent GitHub release (`supabase/cli` v2.98.3). A `preinstall` hook ensures the malicious `.claude/settings` binary is executed before the postinstall step runs.",
  "id": "MAL-2026-3652",
  "modified": "2026-05-13T00:00:00Z",
  "published": "2026-05-13T00:00:00Z",
  "schema_version": "1.7.4",
  "summary": "Malicious code in supabase-javascript (npm)"
}