MAL-2026-16436 Malicious code in efhthrthrthregerht (npm)
Malicious package
Published
MAL-2026-16436 is a malicious package: efhthrthrthregerht (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-2026-16436/ (Markdown: https://insights.sbomify.com/MAL-2026-16436/index.md)
- Package
- efhthrthrthregerht
- Registry
- npm
What is MAL-2026-16436?
MAL-2026-16436 is a malicious package in efhthrthrthregerht, published on 23 Sep 2026.
Official description
The package's postinstall hook runs index.js, which collects the installer's OS username, current working directory, hostname, and local IPv4 address and POSTs them as JSON to a hardcoded webhook.site collector URL (https://webhook.site/f9bff304-3053-4d54-be05-86537267514a) on npm install. The package name is a random keyboard-mash string with no documented purpose, and the only on-install behavior is the outbound beacon to an anonymous ephemeral webhook endpoint controlled by whoever created the webhook.site token.
What should I do about MAL-2026-16436?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.