Which versions of @kyuu2nd/baileys are malicious?

The following npm versions of @kyuu2nd/baileys are flagged malicious: 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.10, 2.0.11, 2.0.12, 2.0.24, 2.0.25. Treat any of these as compromised.

How do I remediate @kyuu2nd/baileys if I installed it?

Remove @kyuu2nd/baileys from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed @kyuu2nd/baileys — how do I know if it already compromised me?

If @kyuu2nd/baileys was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

How do I find @kyuu2nd/baileys across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @kyuu2nd/baileys (14 malicious versions).

Malicious package

@kyuu2nd/baileysnpm

Advisory published Oct 27, 2026Updated Nov 9, 2026

@kyuu2nd/baileys is a confirmed malicious npm package (MAL-2026-18859) that executes malicious code on install (malicious versions 2.0.0, 2.0.1, 2.0.2…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @kyuu2nd/baileys (npm)

MAL-2026-18859

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall @kyuu2nd/baileys

What this malware does

@kyuu2nd/baileys is a fork of the Baileys WhatsApp Web library that silently subscribes the installer's own WhatsApp account to WhatsApp Channels chosen by the publisher. When the socket connects, code in lib/Socket/newsletter.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363330344810280@newsletter, 120363400738305381@newsletter, 120363402868866359@newsletter, 120363404790454890@newsletter, 120363404861802607@newsletter, 120363405313529091@newsletter and 13 more (stored as character-code arrays) and a list downloaded at runtime from https://raw.githubusercontent.com/kiuur/IDCH/refs/heads/main/idch.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Malicious versions

14 flagged

2.0.02.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.102.0.112.0.122.0.242.0.25

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for @kyuu2nd/baileys (14 malicious versions).
If you installed it — respond
Remove @kyuu2nd/baileys from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If @kyuu2nd/baileys was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. @kyuu2nd/baileys on npm has been identified as a malicious package (versions 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, and 6 more flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

Credits

CyberXYZ · finder

Detect & block this

O3 blocks @kyuu2nd/baileys-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

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