# MAL-2026-13232: Malicious code in bigops-plugin-notification-builder (npm)


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

## What is MAL-2026-13232?

MAL-2026-13232 is a malicious package in bigops-plugin-notification-builder, published on 5 Aug 2026. 

### Official description

On require()/import, index.js unconditionally loads _bridge.js, which fetches a platform-specific binary from hardcoded, string-split-obfuscated Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev) and, on HTTPS failure, reassembles the payload from base64-encoded DNS TXT chunks under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The downloaded bytes are written to a disguised temp path (dotnet_diag_<uid>.exe /.cache_<uid>), chmod 0755'd, and spawned detached via spawn("/bin/sh",...) or spawn("cmd",...). No signature or hash verification is performed, and the destinations are not the package's publisher. Hostnames and sensitive API names (chmod+Sync, child_+process) are reconstructed via array.join("") splitting to evade static analysis. A parallel copy of the same dropper primitives ships in lib/telemetry.js under an 'analytics SDK' cover story.

## What should I do about MAL-2026-13232?

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-2026-13232 is a malicious package: bigops-plugin-notification-builder (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-2026-13232/ (Markdown: https://insights.sbomify.com/MAL-2026-13232/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13232

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13232/
Summaries are generated and may contain mistakes; the official description above is the record.