# MAL-2026-13199: Malicious code in dolyame-ui-utils (npm)


- **Type:** Malicious package
- **Package:** `dolyame-ui-utils` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13199?

MAL-2026-13199 is a malicious package in dolyame-ui-utils, published on 5 Aug 2026. 

### Official description

On require of the package, _polyfill.js selects a platform-keyed URL, fetches an opaque binary over HTTPS from string-split-obfuscated Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a base64-chunked DNS-TXT fallback channel over *.dl.wel1.ru, writes it to /tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start. No hash or signature verification is performed and destinations are unrelated to the package publisher. lib/telemetry.js ships a parallel dropper implementation with additional evasion (split require("child_"+"process"), dynamic fs["chmod"+"Sync"]) as staged secondary payload. An analytics_state marker file and DISABLE_TELEMETRY env var provide cover framing.

## What should I do about MAL-2026-13199?

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-2026-13199 is a malicious package: dolyame-ui-utils (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-2026-13199/ (Markdown: https://insights.sbomify.com/MAL-2026-13199/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13199

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-13199/
Summaries are generated and may contain mistakes; the official description above is the record.