common-array-token

GHSA-7x83-g5rh-27vr

Malicious code in common-array-token (npm)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## 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.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/e4956292c0cf024519ebae88e8b315a0af37a829/osv/malicious/npm/common-array-token/MAL-2026-15550.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/e4956292c0cf024519ebae88e8b315a0af37a829/osv/malicious/npm/common-array-token/MAL-2026-15550.json
- https://www.npmjs.com/package/common-array-token/v/1.0.0
- https://github.com/advisories/GHSA-7x83-g5rh-27vr

Compromised versions (1)

= 1.0.0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.