# MAL-2026-12441: Malicious code in sme-scripts-shared-library-webpack-plugin (npm)


- **Type:** Malicious package
- **Package:** `sme-scripts-shared-library-webpack-plugin` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-9hjr-v9x6-4g6g

## What is MAL-2026-12441?

MAL-2026-12441 is a malicious package in sme-scripts-shared-library-webpack-plugin, published on 5 Aug 2026. 

### Official description

sme-scripts-shared-library-webpack-plugin@20.2.9 executes an install/import-time dropper. index.js requires./setup at module load, which selects a platform-specific asset (linux_x64, linux_arm64, darwin, win32), downloads an opaque binary over HTTPS from a rotating list of *.workers.dev hosts (oob-worker.cf103-070.workers.dev, cf99-9b3.workers.dev, cf101-adf.workers.dev, cf100-416.workers.dev), with a DNS-TXT chunked base64 fallback channel over *.dl.well1.site (tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site). Fetched bytes are written to /tmp or %TEMP% under decoy names ('.cache_<rnd>' on POSIX, 'dotnet_diag_<rnd>.exe' on Windows), chmod 755, and launched detached via cp.spawn('/bin/sh', ['-c', fp + ' &']) or cmd.exe. Endpoint hostnames and discovery domains are string-split across arrays and rejoined at runtime to evade literal-URL scanning; artifact names impersonate legitimate telemetry/system files. lib/telemetry.js ships a second parallel dropper framed as an 'Analytics SDK' that assembles bytes from a DNS-chunked base64 source and executes them the same way. No hash or signature verification is performed on any fetched payload.

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-2026-12441?

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-2026-12441 is a malicious package: sme-scripts-shared-library-webpack-plugin (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-2026-12441/ (Markdown: https://insights.sbomify.com/MAL-2026-12441/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12441

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12441/
Summaries are generated and may contain mistakes; the official description above is the record.