# MAL-2026-6716: Malicious code in test-pkg-pnpm (npm)


- **Type:** Malicious package
- **Package:** `test-pkg-pnpm` (npm)
- **Published:** 1 Jul 2026
- **Also known as:** GHSA-7grv-5j2w-4wx3

## What is MAL-2026-6716?

MAL-2026-6716 is a malicious package in test-pkg-pnpm, published on 1 Jul 2026. 

### Official description

On `npm install`, the package's `postinstall` script (`node demo-clean.js`) auto-executes two installer-side actions without consent. First, `openDemo()` platform-branches via `execSync` to open https://github.com/X3r0Day/BunnyHijack in the installer's default browser and to spawn the OS calculator (`calc` on Windows, `open -a Calculator` on macOS, `gnome-calculator`/`kcalc` on Linux) — the canonical `calc.exe` proof of unauthenticated code execution on the installer's host. Second, `cleanup()` walks every ancestor directory of `INIT_CWD`, `process.cwd()`, and the user's home directory, calling `fs.rmSync(..., {recursive:true, force:true})` against paths inside each ancestor's `node_modules`, `node_modules/.pnpm`, `node_modules/.bin/node*` shims, `~/.npm/_npx`, `~/.bun/install/cache`, and tmpdir entries; `cleanupPackageJson()` then reads each ancestor `package.json` and rewrites it via `fs.writeFileSync` after deleting matching entries from `dependencies`, `devDependencies`, `optionalDependencies`, and `peerDependencies`. The destructive recursive-force-rm operates well outside the package's own directory and reaches the user's home tree, and the spawned-process primitive can be retargeted to any binary in a future release.

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-2026-6716?

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-2026-6716 is a malicious package: test-pkg-pnpm (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-2026-6716/ (Markdown: https://insights.sbomify.com/MAL-2026-6716/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6716

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6716/
Summaries are generated and may contain mistakes; the official description above is the record.