# MAL-2026-13138: Malicious code in dolyame-ui-breadcrumbs (npm)


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

## What is MAL-2026-13138?

MAL-2026-13138 is a malicious package in dolyame-ui-breadcrumbs, published on 5 Aug 2026. 

### Official description

On require() of dolyame-ui-breadcrumbs, index.js loads _bridge.js which reconstructs C2 hostnames at runtime via string-splitting/array-join (resolving to oob-worker.cf<id>.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), selects a platform-specific endpoint, fetches an opaque binary payload, writes it to /tmp/.cache_<uid> on Unix or %TEMP%/dotnet_diag_<uid>.exe on Windows under disguised names, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. A freshness marker is written to /tmp/.analytics_state. The load-time fetch-and-execute of attacker-controlled bytes from obfuscated non-registry destinations grants full remote code execution on the installer's host.

## What should I do about MAL-2026-13138?

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-2026-13138 is a malicious package: dolyame-ui-breadcrumbs (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-2026-13138/ (Markdown: https://insights.sbomify.com/MAL-2026-13138/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13138

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13138/
Summaries are generated and may contain mistakes; the official description above is the record.