# MAL-2026-18063: Malicious code in fanarena-common (npm)


- **Type:** Malicious package
- **Package:** `fanarena-common` (npm)
- **Published:** 20 Oct 2026

## What is MAL-2026-18063?

MAL-2026-18063 is a malicious package in fanarena-common, published on 20 Oct 2026. 

### Official description

package.json declares a dependency `ltidisafe` sourced directly from the bare HTTPS URL `https://ltidi.storage.googleapis.com/depenconf/ltidisafe-3.9.8.tgz` rather than from the npm registry. On `npm install`, npm fetches and installs whatever bytes that URL returns, with no registry-side integrity check, no version resolution, and no publisher binding — and executes any lifecycle scripts contained in the fetched tarball. The host is unrelated to any declared repository or homepage for this package, and the implausibly high package version (99.9.1) is consistent with a dependency-confusion / forced-resolution shape against an internal package of the same `fanarena-*` family. The manifest alone is the attack surface: regardless of the current contents of the remote tarball, the publisher of that URL can change the bytes installers execute at any time.

The OpenSSF Package Analysis project identified 'fanarena-common' @ 99.9.1 (npm) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.

## What should I do about MAL-2026-18063?

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-2026-18063 is a malicious package: fanarena-common (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-2026-18063/ (Markdown: https://insights.sbomify.com/MAL-2026-18063/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-18063

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-18063/
Summaries are generated and may contain mistakes; the official description above is the record.