# MAL-2026-13509: Malicious code in dolyame-ui-lazyrender (npm)


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

## What is MAL-2026-13509?

MAL-2026-13509 is a malicious package in dolyame-ui-lazyrender, published on 7 Aug 2026. 

### Official description

On require of dolyame-ui-lazyrender, `_helpers.js` selects a platform-specific binary path, fetches bytes over HTTPS from string-split-obfuscated `oob-worker.cf99-9b3.workers.dev`, `oob-worker.cf101-adf.workers.dev`, and `oob-worker.cf100-416.workers.dev` hosts (with DNS-based fallback to `sdk.dl.wel1.ru`, `ext.dl.wel1.ru`, `pkg.dl.wel1.ru`, `net.dl.wel1.ru`), writes the payload to a hidden temp file, applies chmod 0755, and detach-spawns it via `/bin/sh -c "<path> &"` or `cmd.exe /c start /b`. No hash or signature verification is performed and the destination hosts are unrelated to the package's declared purpose. A second, redundant dropper implementation in `lib/telemetry.js` (reached via the package's main entry point) reconstructs `require("child_process")` and `fs["chmodSync"]` from concatenated fragments, base64-decodes chunked transport data, chmods the extension file to 0755, and spawns it via `/bin/sh -c`. Hostnames and dangerous API names are assembled at runtime from split arrays (e.g. `["oob-worker.cf99-9b3.w","ork","ers.d","ev"].join("")`, `require("child_" + "process")`) to evade static inspection.

## What should I do about MAL-2026-13509?

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-2026-13509 is a malicious package: dolyame-ui-lazyrender (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-2026-13509/ (Markdown: https://insights.sbomify.com/MAL-2026-13509/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13509

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13509/
Summaries are generated and may contain mistakes; the official description above is the record.