# MAL-2026-10659: Malicious code in @sauruslord/libsignal (npm)


- **Type:** Malicious package
- **Package:** `@sauruslord/libsignal` (npm)
- **Published:** 15 Jul 2026
- **Also known as:** GHSA-p9pv-49fq-8f6m

## What is MAL-2026-10659?

MAL-2026-10659 is a malicious package in @sauruslord/libsignal, published on 15 Jul 2026. 

### Official description

Package name impersonates Open Whisper Systems' libsignal-node but ships unrelated code. On require() of index.js, after a 1-second delay, install.js locates the installer's @whiskeysockets/baileys directory and overwrites lib/Socket/newsletter.js with an attacker-supplied stub. The replacement stub schedules a setTimeout that, 120 seconds after the host application starts, silently invokes newsletterWMexQuery('120363425694844039@newsletter', QueryIds.FOLLOW) using the installer's authenticated WhatsApp session — auto-following an attacker-controlled WhatsApp newsletter channel without user consent. The original newsletter.js is destroyed (a restoreBackup export is referenced but no backup is ever written). install.js also schedules process.exit(0) 20 seconds after import, terminating the host application. Declared dependencies list `crypto`, `fs`, and `path` as npm packages rather than Node builtins, pulling in registry placeholders/typosquats. Installer harm: any developer who imports this package and also depends on @whiskeysockets/baileys has a third-party dependency silently rewritten on disk and their authenticated WhatsApp session abused on every subsequent run.

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-2026-10659?

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-2026-10659 is a malicious package: @sauruslord/libsignal (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-2026-10659/ (Markdown: https://insights.sbomify.com/MAL-2026-10659/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-10659

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-10659/
Summaries are generated and may contain mistakes; the official description above is the record.