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OpenAdvisories
Malicious MAL-2026-15550

common-array-token

npm package · versions 1.0.0

Reported Aug 29, 2026 · Updated Aug 29, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (bf8dc846e743e9517d8444feb25299ce05d9c6e060a050fdaa1b3b44a8cb5cbd)
package.json declares scripts.postinstall = 'node index.js'. On npm install, index.js reconstructs a URL from a String.fromCharCode numeric array (decoding to https://access-token-delta.vercel.app/), fetches JSON from that endpoint, and passes the returned 'token' field to eval(). Any JavaScript served by that endpoint executes on the installer's machine with the user's privileges at install time. The endpoint is hardcoded and controlled by the package author; the char-code obfuscation conceals the destination from plaintext scanning. There is no legitimate purpose served by fetching and eval'ing remote code from an obfuscated URL in a postinstall hook.