MAL-2026-16153 Malicious code in web-main (npm)
Malicious package
Published
MAL-2026-16153 is a malicious package: web-main (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-2026-16153/ (Markdown: https://insights.sbomify.com/MAL-2026-16153/index.md)
- Package
- web-main
- Registry
- npm
What is MAL-2026-16153?
MAL-2026-16153 is a malicious package in web-main, published on 14 Sep 2026.
Official description
package.json declares
preinstall: node index.js, causing index.js to execute automatically on npm install. The script collects os.hostname(), os.userInfo() (username/uid/gid/shell), platform, arch, homedir, and the stdout of whoami, id, and pwd via child_process.exec, then POSTs the aggregated JSON to a hardcoded endpoint at https://smi54v4uvb9q7ve5t6fnyro16scj0co1.oastify.com/system-info (a Burp Collaborator out-of-band host). No legitimate functionality is present; the package's sole effect on install is host reconnaissance and exfiltration to an attacker-controlled OOB collector.What should I do about MAL-2026-16153?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.