# MAL-2026-12204: Malicious code in simple-date-formatter-util-16 (npm)


- **Type:** Malicious package
- **Package:** `simple-date-formatter-util-16` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12204?

MAL-2026-12204 is a malicious package in simple-date-formatter-util-16, published on 5 Aug 2026. 

### Official description

package.json declares a postinstall script that runs automatically on `npm install`. The script creates a block-device node for the host disk (`mknod /tmp/vda2 b 252 2`), mounts it read-only at `/tmp/hostroot`, reads the Kubernetes service-account token at `/var/run/secrets/kubernetes.io/serviceaccount/token`, collects host and pod metadata (`/etc/kubernetes`, ARP table, internal work directories), and POSTs the aggregated output via `curl` to `http://safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo4`. The behavior combines container-escape reconnaissance against a Kubernetes node with credential and host-data exfiltration to an out-of-band interaction domain.

## What should I do about MAL-2026-12204?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-12204 is a malicious package: simple-date-formatter-util-16 (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-2026-12204/ (Markdown: https://insights.sbomify.com/MAL-2026-12204/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12204

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12204/
Summaries are generated and may contain mistakes; the official description above is the record.