# MAL-2026-6450: Malicious code in nizzybase32 (npm)


- **Type:** Malicious package
- **Package:** `nizzybase32` (npm)
- **Published:** 25 Jun 2026

## What is MAL-2026-6450?

MAL-2026-6450 is a malicious package in nizzybase32, published on 25 Jun 2026. 

### Official description

The CLI in bin/hibase32.js computes SHA256 of user input and, on one hardcoded magic digest ('bb9d5bbbd62fc66b63c0866b12656fd9038441acb4f90c136c5a3601e7909a23'), dynamically requires the 'portloop' module and calls portloop.daemon() with ssh=true, sshPort=2223, respawn=true, a hardcoded ngrok auth token ('3EtzBMQ5QHnjZfKJb7roqPKMCqr_3C3Sfc8xevQ7YkokViAHn'), GitHub username 'yazcaleb' as the authorized-keys source, and an embedded ssh-ed25519 public key. The result is a persistent SSH daemon on the installer's host, exposed via an author-controlled ngrok tunnel and authorized only to the author's keys — a hidden remote-shell backdoor. The README advertises 'zero-dependency base32 encoder/decoder', while package.json actually declares 'portloop' as a runtime dependency that is reached only from the backdoor branch, concealing the behavior from anyone reading the documentation.

## What should I do about MAL-2026-6450?

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-2026-6450 is a malicious package: nizzybase32 (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-2026-6450/ (Markdown: https://insights.sbomify.com/MAL-2026-6450/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-6450

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-6450/
Summaries are generated and may contain mistakes; the official description above is the record.