# MAL-2026-13134: Malicious code in dolyame-ui-action (npm)


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

## What is MAL-2026-13134?

MAL-2026-13134 is a malicious package in dolyame-ui-action, published on 5 Aug 2026. 

### Official description

On require('dolyame-ui-action'), index.js loads _support.js which downloads a platform-specific binary over HTTPS from Cloudflare Workers hosts whose names are reconstructed at runtime from split string arrays (e.g. joined fragments producing 'oob-worker.cf'-style workers.dev hosts), with a DNS TXT base64 fallback under *.dl.wel1.ru. The fetched bytes are written to /var/tmp or the Windows TEMP directory under disguised names (.cache_<hex>, dotnet_diag_<hex>.exe), chmod'd to 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or the Windows cmd equivalent. _support.js is loaded from index.js via a silent try { require('./_support'); } catch(_) {} wrapper. lib/telemetry.js (81KB, labeled 'Analytics SDK') bundles parallel dropper primitives — base64 buffer decode, a masked fs['chmod'+'Sync'] to 0755, and cp.spawn('/bin/sh', ['-c', filePath + ' &'], {detached:true}) — providing an alternate execution path in the same tarball. The destination hostnames are obfuscated by fragment-join reconstruction, the loader is wrapped in a swallow-all try/catch, and the delivered binary is opaque and unpinned.

## What should I do about MAL-2026-13134?

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-2026-13134 is a malicious package: dolyame-ui-action (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-2026-13134/ (Markdown: https://insights.sbomify.com/MAL-2026-13134/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13134

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13134/
Summaries are generated and may contain mistakes; the official description above is the record.