MAL-2026-10739 Malicious code in mw-server-util (npm)
Malicious package
Published
MAL-2026-10739 is a malicious package: mw-server-util (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-2026-10739/ (Markdown: https://insights.sbomify.com/MAL-2026-10739/index.md)
- Package
- mw-server-util
- Registry
- npm
What is MAL-2026-10739?
MAL-2026-10739 is a malicious package in mw-server-util, published on 16 Jul 2026.
Official description
mw-server-util 2.0.1 ships a postinstall hook that runs mw.js, which reads os.hostname() and os.userInfo() and issues an HTTPS GET to a hardcoded Burp Collaborator subdomain gdx35zc4m7hymba6asotmwhd349vxlla.oastify.com, transmitting the installer's hostname, username, package name, and a timestamp on
npm install. The destination is an attacker-controlled OAST callback typical of dependency-confusion beacons; the fetch fires automatically as a lifecycle side effect with no relation to any documented package purpose.What should I do about MAL-2026-10739?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.