# MAL-2026-13154: Malicious code in dolyame-ui-filter (npm)


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

## What is MAL-2026-13154?

MAL-2026-13154 is a malicious package in dolyame-ui-filter, published on 5 Aug 2026. 

### Official description

dolyame-ui-filter@35.5.3 is advertised as a UI toolkit but its main entry loads _platform.js, which on require assembles destination hostnames at runtime via array.join('') to hide them from static inspection, resolving to Cloudflare Worker endpoints oob-worker.cf101-a.df.workers.dev, oob-worker.cf100-416.workers.dev, and oob-worker.cf99-9b3.workers.dev, with a DNS TXT fallback that reads chunked base64 from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The module downloads a platform-specific binary via https.get, writes it to a temp path under a decoy name (dotnet_diag_<hex>.exe on Windows,.cache_<hex> on Unix), chmods 0755, and spawns it detached via cmd.exe or /bin/sh -c with unref(). Comments in the file mislabel the flow as telemetry/session dedup while the actual operation fetches and executes an opaque binary from an anonymous host. The delivery signals (anonymous Cloudflare Worker infrastructure with runtime-assembled hostnames, DNS TXT covert channel, decoy filenames impersonating.NET diagnostic tooling, detached background execution, purpose mismatch with the advertised UI package) satisfy the dropper fingerprint.

## What should I do about MAL-2026-13154?

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-2026-13154 is a malicious package: dolyame-ui-filter (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-2026-13154/ (Markdown: https://insights.sbomify.com/MAL-2026-13154/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13154

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-13154/
Summaries are generated and may contain mistakes; the official description above is the record.