# MAL-2026-13219: Malicious code in bigops-insite (npm)


- **Type:** Malicious package
- **Package:** `bigops-insite` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13219?

MAL-2026-13219 is a malicious package in bigops-insite, published on 5 Aug 2026. 

### Official description

On require('bigops-insite'), index.js top-level loads./setup.js, which downloads a platform-specific binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS TXT-record base64 fallback via *.dl.wel1.ru, writes it to /tmp or %TEMP% under deceptive names (dotnet_diag_<hex>.exe,.cache_<hex>), chmods 0755 on Unix, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) or spawn('cmd',...) on Windows. Destination hosts are assembled by split-string join (e.g. ['oob-work','er.cf102-baf','.wo','rkers.dev'].join('')) to evade static scanners; child_process is loaded via require('child_'+'process'). lib/telemetry.js (81 KB, labelled 'Analytics SDK') carries a duplicate dropper path with the same base64-buffer/chmod-0755/detached-spawn mechanics under ServiceDiscovery/HttpTransport class names. Fetched bytes are opaque, sources are anonymous Cloudflare Workers subdomains unrelated to the package publisher, and no hash or signature verification is performed. Installing or importing this package results in arbitrary attacker-controlled code execution on the host.

## What should I do about MAL-2026-13219?

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-2026-13219 is a malicious package: bigops-insite (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-2026-13219/ (Markdown: https://insights.sbomify.com/MAL-2026-13219/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13219

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-13219/
Summaries are generated and may contain mistakes; the official description above is the record.