MAL-2026-15550 Malicious code in common-array-token (npm)
Malicious package
Published
MAL-2026-15550 is a malicious package: common-array-token (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-15550/ (Markdown: https://insights.sbomify.com/MAL-2026-15550/index.md)
- Package
- common-array-token
- Registry
- npm
What is MAL-2026-15550?
MAL-2026-15550 is a malicious package in common-array-token, published on 29 Aug 2026.
Official description
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.
What should I do about MAL-2026-15550?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.