MAL-2026-12199 Malicious code in simple-date-formatter-new-8 (npm)
Malicious package
Published
MAL-2026-12199 is a malicious package: simple-date-formatter-new-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-2026-12199/ (Markdown: https://insights.sbomify.com/MAL-2026-12199/index.md)
- Package
- simple-date-formatter-new-8
- Registry
- npm
What is MAL-2026-12199?
MAL-2026-12199 is a malicious package in simple-date-formatter-new-8, published on 5 Aug 2026.
Official description
The package.json postinstall script runs unconditionally on
npm install, collecting host and internal-network reconnaissance (kernel version via uname -r, /etc/resolv.conf, hostname -I, /proc/net/route, internal TCP endpoint probes, and Kubernetes API probes against 10.45.196.x /version and /api/v1/namespaces) and POSTs the aggregated output via curl to an attacker-controlled interact.sh OAST collector at http://safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfoF. A sibling postinstall.js enumerates the installer's ~/.ssh directory and POSTs the contents along with username and platform to a hardcoded remote host at 124.221.154.135:443/post. The declared purpose is a trivial date formatter, which has no legitimate need to read SSH material, enumerate internal networks, or contact OAST infrastructure.What should I do about MAL-2026-12199?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.