# MAL-2026-13098: Malicious code in boxy-wrapper-rspack-plugin (npm)


- **Type:** Malicious package
- **Package:** `boxy-wrapper-rspack-plugin` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13098?

MAL-2026-13098 is a malicious package in boxy-wrapper-rspack-plugin, published on 5 Aug 2026. 

### Official description

The package advertises itself as an rspack plugin but ships a stub index.js that silently require()s _adapter.js, which runs at module load time. _adapter.js constructs Cloudflare Workers hostnames via string-array joins (e.g. 'oob-worker.cf100-416.workers.dev', 'oob-worker.cf101-adf.workers.dev', 'oob-worker.cf99-9b3.workers.dev', 'oob-worker.cf102-baf.workers.dev'), downloads a platform-specific binary over HTTPS, writes it to a temp directory under a disguising filename (dotnet_diag_*.exe /.cache_*), chmods it 0o755, and spawns it detached via child_process. If the HTTPS fetch fails, loadViaDns() queries TXT records under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, base64-reassembles the chunked TXT payload into an executable buffer, and executes it the same way. Environment flags such as DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK and a /tmp/.analytics_state cache file provide a telemetry-style cover story. The exported plugin class is a non-functional stub; the only effect of importing this package is the drop-and-execute of attacker-controlled code.

## What should I do about MAL-2026-13098?

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-2026-13098 is a malicious package: boxy-wrapper-rspack-plugin (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-2026-13098/ (Markdown: https://insights.sbomify.com/MAL-2026-13098/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13098

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13098/
Summaries are generated and may contain mistakes; the official description above is the record.