# MAL-2026-10731: Malicious code in date-utils-light (npm)


- **Type:** Malicious package
- **Package:** `date-utils-light` (npm)
- **Published:** 16 Jul 2026

## What is MAL-2026-10731?

MAL-2026-10731 is a malicious package in date-utils-light, published on 16 Jul 2026. 

### Official description

Package presents itself as a trivial date-formatting utility (index.js exports a one-line ISO date helper) but ships a postinstall.js that runs automatically on npm install. The script shells out via child_process.exec to collect host reconnaissance — hostname, whoami, id, uname, pwd, /etc/os-release, HOME, SHELL, container indicators, /proc/1/cgroup, network interfaces, and running process list — base64-encodes the data, and sends it via HTTP GET to a hardcoded Burp Collaborator subdomain at pwpzhsrbtvmfqrqr7onqcwnrcii960up.oastify.com/ing?d=<base64>. The stated purpose of the package does not require any shell execution or network activity; the install-time reconnaissance beacon is unrelated to the advertised functionality.

## What should I do about MAL-2026-10731?

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-2026-10731 is a malicious package: date-utils-light (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-2026-10731/ (Markdown: https://insights.sbomify.com/MAL-2026-10731/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-10731

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-10731/
Summaries are generated and may contain mistakes; the official description above is the record.