MAL-2026-12206 Malicious code in simple-date-formatter-util-8 (npm)
Malicious package
Published
MAL-2026-12206 is a malicious package: simple-date-formatter-util-8 (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-2026-12206/ (Markdown: https://insights.sbomify.com/MAL-2026-12206/index.md)
- Package
- simple-date-formatter-util-8
- Registry
- npm
What is MAL-2026-12206?
MAL-2026-12206 is a malicious package in simple-date-formatter-util-8, published on 5 Aug 2026.
Official description
package.json declares a postinstall lifecycle script that runs curl against the hardcoded bare-IP endpoint http://124.221.154.135/pre, passing the installer's hostname and username as query parameters ($(hostname), $(whoami)). The package presents itself as a trivial date-formatting utility, a purpose that has no need for network I/O at install time. The behavior fires automatically on npm install and leaks installer host identity to a non-first-party attacker-controlled endpoint.
What should I do about MAL-2026-12206?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.