MAL-2026-13743 Malicious code in whs4_ued (npm)
Malicious package
Published
MAL-2026-13743 is a malicious package: whs4_ued (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-2026-13743/ (Markdown: https://insights.sbomify.com/MAL-2026-13743/index.md)
- Package
- whs4_ued
- Registry
- npm
What is MAL-2026-13743?
MAL-2026-13743 is a malicious package in whs4_ued, published on 11 Aug 2026.
Official description
On npm install, the package's postinstall hook runs
node index.js, which POSTs installer host information — the absolute path of the package file (leaking the OS username and home directory layout), Node.js version, platform, and architecture — to a hardcoded Discord webhook at discord.com/api/webhooks/1530599209269465319/. The webhook token is assembled via string concatenation at the call site to evade naive string matching. The destination is attacker-controlled and unrelated to the package's stated educational typo-catcher purpose, and there is no consent gate.What should I do about MAL-2026-13743?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.