# MAL-2026-12817: Malicious code in beaver-ui-list (npm)


- **Type:** Malicious package
- **Package:** `beaver-ui-list` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-7c8x-hmc9-qmh3

## What is MAL-2026-12817?

MAL-2026-12817 is a malicious package in beaver-ui-list, published on 5 Aug 2026. 

### Official description

On require('beaver-ui-list'), index.js loads _ext.js, which selects a payload path based on OS and architecture, downloads a native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT chunked fallback to *.dl.wel1.ru, writes it to /tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh or cmd. Host and domain literals are assembled at runtime from split-string arrays joined with.join("") to defeat static inspection, and a.analytics_state marker file plus a check of DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK environment variables provide a telemetry cover story. The package advertises itself as a UI component library; the payload delivery and execution have no relationship to that purpose and grant arbitrary code execution on the installer's host on module load.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-12817?

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-2026-12817 is a malicious package: beaver-ui-list (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-2026-12817/ (Markdown: https://insights.sbomify.com/MAL-2026-12817/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12817

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12817/
Summaries are generated and may contain mistakes; the official description above is the record.