MAL-2026-13697 Malicious code in simple-date-formatter-new-10 (npm)
Malicious package
Published
MAL-2026-13697 is a malicious package: simple-date-formatter-new-10 (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-2026-13697/ (Markdown: https://insights.sbomify.com/MAL-2026-13697/index.md)
- Package
- simple-date-formatter-new-10
- Registry
- npm
What is MAL-2026-13697?
MAL-2026-13697 is a malicious package in simple-date-formatter-new-10, published on 10 Aug 2026.
Official description
[email protected] presents itself as a trivial date-formatting utility but ships two attack payloads that fire when npm installs the package. The package.json postinstall script opens an interactive bash reverse shell over /dev/tcp to 124.221.154.135:4444, giving the publisher remote command execution on the installer's host. A bundled postinstall.js reads the installer's ~/.ssh directory and POSTs its contents together with username and platform to https://124.221.154.135/post, the same C2 endpoint. The advertised date-formatting API (index.js exporting formatDate) is a cover story for the reverse-shell and SSH-key-theft payloads.
What should I do about MAL-2026-13697?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.