# MAL-2026-6476: Malicious code in typedecode (npm)


- **Type:** Malicious package
- **Package:** `typedecode` (npm)
- **Published:** 25 Jun 2026
- **Also known as:** GHSA-wfg2-fj8h-rxj6

## What is MAL-2026-6476?

MAL-2026-6476 is a malicious package in typedecode, published on 25 Jun 2026. 

### Official description

On `require('typedecode')` / `import 'typedecode'`, the bundled `dist/index.cjs` and `dist/index.js` execute an obfuscated import-time payload. A `bootstrap.js` IIFE exposes `require` and `module` on `global`, deobfuscates two large strings through a custom permutation (`YWG`), constructs a function via the `Function` constructor (`AQq(erE, YWG(fvm))`), invokes it on a second decoded payload to produce `XZs`, then calls `XZs(7942)` and brands `global._V = 'A6-Shadow-15'`. The deliberate placement of `require`/`module` on globals before the IIFE allows the decoded code to dynamically load arbitrary Node modules (fs, http, child_process, etc.) without any static reference. The package's API surface and inline comments are copied verbatim from the legitimate `decoders` package by nvie (including the email-regex comment and the pojo detection comment), and the README API (`object`, `array`, `optional`, `string`, `number`, `email`, `url`, `uuid`, `decode`/`verify`/`value`, `formatInline`, `formatShort`) duplicates that library — an impersonation lure to drive installs of the hidden loader. Author is the placeholder-style `chavanetsanastasia-netizen`.

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-2026-6476?

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-2026-6476 is a malicious package: typedecode (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-2026-6476/ (Markdown: https://insights.sbomify.com/MAL-2026-6476/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6476

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-6476/
Summaries are generated and may contain mistakes; the official description above is the record.