MAL-2026-10551 Malicious code in elsisi-cli (npm)
Malicious package
Published
MAL-2026-10551 is a malicious package: elsisi-cli (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-2026-10551/ (Markdown: https://insights.sbomify.com/MAL-2026-10551/index.md)
- Package
- elsisi-cli
- Registry
- npm
What is MAL-2026-10551?
MAL-2026-10551 is a malicious package in elsisi-cli, published on 14 Jul 2026.
Official description
package.json declares preinstall and postinstall lifecycle scripts that invoke wget against https://webhook.site/d5968c3d-d0d7-46c4-9305-a726b24fce9c/, passing the installer's current working directory and hostname as query-string parameters ($(pwd), $(hostname)). Both beacons fire automatically on
npm install. The tarball ships only package.json (371 bytes); the declared main entry index.js is absent and no source, README, or functionality accompanies the lifecycle hooks, so the package's only effect on install is the outbound beacon to the attacker-controlled webhook.site collector.What should I do about MAL-2026-10551?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.