# MAL-2026-16271: Malicious code in test89078-auth (npm)


- **Type:** Malicious package
- **Package:** `test89078-auth` (npm)
- **Published:** 17 Sep 2026

## What is MAL-2026-16271?

MAL-2026-16271 is a malicious package in test89078-auth, published on 17 Sep 2026. 

### Official description

The package's preinstall script (scripts.preinstall = 'node index.js') runs automatically on npm install and collects os.userInfo().username and os.hostname(), then issues a dns.lookup against a subdomain of 31ee29fe-db68-4fd3-86a2-2b707b9e95f0.dnshook.site with the username and hostname embedded in the queried label. This is a DNS-based exfiltration beacon: installing the package transmits installer host identifiers to a non-first-party canary domain over DNS resolution at install time. The version number 99.99.99 and package name shape are consistent with a dependency-confusion lure targeting an internal package name.

## What should I do about MAL-2026-16271?

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-2026-16271 is a malicious package: test89078-auth (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-2026-16271/ (Markdown: https://insights.sbomify.com/MAL-2026-16271/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-16271

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-16271/
Summaries are generated and may contain mistakes; the official description above is the record.