MAL-2026-5653 Malicious code in pc-optimizer (npm)
Malicious package
Published
MAL-2026-5653 is a malicious package: pc-optimizer (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-2026-5653/ (Markdown: https://insights.sbomify.com/MAL-2026-5653/index.md)
- Package
- pc-optimizer
- Registry
- npm
What is MAL-2026-5653?
MAL-2026-5653 is a malicious package in pc-optimizer, published on 11 Jun 2026.
Official description
The package's collect.js imports child_process, fs, http, https, and os, reads host identifiers via os.hostname() and os.homedir(), inspects local filesystem paths via fs.existsSync, and POSTs collected data to a hardcoded external endpoint at http://aab.sportsontheweb.net. The destination is not a registry, vendor SDK host, or documented service — it is an unrelated third-party domain bound to a POST in install/load-reachable code. The combination of system enumeration (hostname, homedir, child_process), filesystem inspection, and a hardcoded non-publisher exfiltration endpoint is the canonical host-information stealer fingerprint and provides direct attacker benefit (host fingerprinting + arbitrary collected data shipped off-host).
What should I do about MAL-2026-5653?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.