Which versions of baileys-multidev are malicious?

The following npm versions of baileys-multidev are flagged malicious: 8.0.2. Treat any of these as compromised.

How do I remediate baileys-multidev if I installed it?

Remove baileys-multidev 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 baileys-multidev — how do I know if it already compromised me?

If baileys-multidev 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 baileys-multidev across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for baileys-multidev (version 8.0.2).

Malicious package

baileys-multidevnpm

Advisory published Oct 27, 2026Updated Nov 9, 2026

baileys-multidev is a confirmed malicious npm package (MAL-2026-18942) that executes malicious code on install (malicious version 8.0.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in baileys-multidev (npm)

MAL-2026-18942

Immediate action

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

npm uninstall baileys-multidev

What this malware does

baileys-multidev 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 a list downloaded at runtime from https://raw.githubusercontent.com/ZackRylsen/Assets/refs/heads/main/config/ChannelId.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Malicious versions

1 flagged

8.0.2

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for baileys-multidev (version 8.0.2).
If you installed it — respond
Remove baileys-multidev 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 baileys-multidev 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. baileys-multidev on npm has been identified as a malicious package (version 8.0.2 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 baileys-multidev-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

Explore

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