# MAL-2026-17619: Malicious code in dzyclutch (npm)


- **Type:** Malicious package
- **Package:** `dzyclutch` (npm)
- **Published:** 5 Oct 2026
- **Also known as:** GHSA-36rj-4crv-cmgm

## What is MAL-2026-17619?

MAL-2026-17619 is a malicious package in dzyclutch, published on 5 Oct 2026. 

### Official description

dzyclutch is a Baileys-family WhatsApp library fork that adds an undocumented behavior: 30 seconds after a WhatsApp connection opens, newsletter.js fetches a JSON list of newsletter JIDs from a hardcoded author-controlled GitHub raw URL (https://raw.githubusercontent.com/noxXza/data/refs/heads/main/noxleys.json, mutable main branch) and uses the installer's authenticated WhatsApp session to issue newsletterFollow then newsletterMute for each JID, so the subscription is hidden from the account owner. A related file (messages-recv.js) obfuscates a hardcoded newsletter JID (120363428355171197@newsletter) and the strings newsletterFollow and newsletterMute via a char-code decoder, concealing the identifiers of the covert-subscription payload from source review. The remote list is author-mutable, so the set of channels the installer's account is silently subscribed to can be changed at any time without any package update. No installer credential theft, remote code execution, filesystem persistence, or exfiltration of installer data to a non-WhatsApp destination is present; the material effect is covert use of the installer's WhatsApp identity to pad reach of channels the author chooses, with the mute step hiding the action from the account owner.

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-2026-17619?

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-2026-17619 is a malicious package: dzyclutch (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-2026-17619/ (Markdown: https://insights.sbomify.com/MAL-2026-17619/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17619

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-17619/
Summaries are generated and may contain mistakes; the official description above is the record.