# MAL-2026-12034: Malicious code in beaver-ui-form-modal (npm)


- **Type:** Malicious package
- **Package:** `beaver-ui-form-modal` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12034?

MAL-2026-12034 is a malicious package in beaver-ui-form-modal, published on 5 Aug 2026. 

### Official description

On require('beaver-ui-form-modal'), index.js loads _shim.js which downloads a platform-specific binary from string-array-obfuscated Cloudflare Worker subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS-TXT chunked-base64 fallback to sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The downloaded bytes are written to a hidden temp path with names mimicking 'dotnet_diag' / '.cache_', chmodded 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true, stdio:'ignore'}) (with a cmd variant for Windows). Hostnames and API identifiers are assembled at runtime via array.join('') to conceal the destinations from static scanners. The fetched binary is unpinned, unverified, and unrelated to any UI-form-modal functionality. lib/telemetry.js additionally carries a dormant sibling dropper (cp.spawn '/bin/sh' + chmodSync 0755, framed as an 'analytics SDK') not reached from the current main entry.

## What should I do about MAL-2026-12034?

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-2026-12034 is a malicious package: beaver-ui-form-modal (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-2026-12034/ (Markdown: https://insights.sbomify.com/MAL-2026-12034/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12034

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12034/
Summaries are generated and may contain mistakes; the official description above is the record.