# MAL-2026-12072: Malicious code in specials-obid-webpack (npm)


- **Type:** Malicious package
- **Package:** `specials-obid-webpack` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-r775-7c47-27mc

## What is MAL-2026-12072?

MAL-2026-12072 is a malicious package in specials-obid-webpack, published on 5 Aug 2026. 

### Official description

On require of the package, _vendor.js selects a URL path by host platform, downloads a binary over HTTPS from destination hostnames assembled at runtime via array `.join("")` string-splits (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev), writes it to a disguised temp path (`/tmp/.cache_<rnd>` on Unix, `%TEMP%\dotnet_diag_<rnd>.exe` on Windows), fs.chmodSync(savePath, 0o755), and spawns it detached via `spawn("/bin/sh",...)` or `spawn("cmd",...)`. A DNS-TXT covert-channel fallback reassembles base64 chunks from `*.dl.well1.site`. A parallel dropper implementation is bundled at lib/telemetry.js using the same DNS-base64 reassembly, `cp.spawn("/bin/sh", ["-c", filePath + " &"])`, and split identifiers (`"child_"+"process"`, `"chmod"+"Sync"`) under a telemetry cover story. Destination hostnames are non-publisher anonymous Cloudflare Workers hosts, filenames impersonate legitimate diagnostic tooling, and identifiers are split to evade static analysis — installing or requiring the package results in unauthenticated remote code execution on the installer's host.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-12072?

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-2026-12072 is a malicious package: specials-obid-webpack (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-2026-12072/ (Markdown: https://insights.sbomify.com/MAL-2026-12072/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12072

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12072/
Summaries are generated and may contain mistakes; the official description above is the record.