MAL-2026-13698 Malicious code in simple-date-formatter-new-9 (npm)
Malicious package
Published
MAL-2026-13698 is a malicious package: simple-date-formatter-new-9 (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-2026-13698/ (Markdown: https://insights.sbomify.com/MAL-2026-13698/index.md)
- Package
- simple-date-formatter-new-9
- Registry
- npm
What is MAL-2026-13698?
MAL-2026-13698 is a malicious package in simple-date-formatter-new-9, published on 10 Aug 2026.
Official description
package.json declares a postinstall script that opens an interactive bash reverse shell to the hardcoded remote address 124.221.154.135:4444 during npm install, granting the operator of that endpoint remote command execution on the installer's host. The tarball additionally ships postinstall.js, which enumerates the installer's ~/.ssh directory and POSTs the file listing along with username and platform information to https://124.221.154.135/post. Both mechanisms target the same hardcoded IP, and the reverse shell fires automatically on npm install.
What should I do about MAL-2026-13698?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.