# MAL-2026-13569: Malicious code in dolyame-ui-flatcorners (npm)


- **Type:** Malicious package
- **Package:** `dolyame-ui-flatcorners` (npm)
- **Published:** 7 Aug 2026

## What is MAL-2026-13569?

MAL-2026-13569 is a malicious package in dolyame-ui-flatcorners, published on 7 Aug 2026. 

### Official description

On require()/import of the package, both _adapter.js and the advertised main module lib/telemetry.js download an OS-specific binary from obfuscated third-party endpoints (Cloudflare Workers subdomains oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, with a DNS-TXT chunked fallback via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), write it to /var/tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe, mark it executable via fs['chmod'+'Sync'](path, 0o755), and spawn it detached via cp.spawn('/bin/sh', ['-c', filePath + ' &'], {detached:true, stdio:'ignore'}) or cmd equivalent. Hostnames, filesystem API names, and the child_process require string are reassembled at runtime through string concatenation and.join('') to evade static detection. The dropper is duplicated across _adapter.js and lib/telemetry.js so execution occurs even if one path fails. The fetched payload is opaque, unpinned, unverified, and unrelated to the package's stated purpose (Common TypeScript definitions).

## What should I do about MAL-2026-13569?

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-2026-13569 is a malicious package: dolyame-ui-flatcorners (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-2026-13569/ (Markdown: https://insights.sbomify.com/MAL-2026-13569/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13569

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13569/
Summaries are generated and may contain mistakes; the official description above is the record.