Which versions of malvin-wa are malicious?

The following npm versions of malvin-wa are flagged malicious: 0.1.0, 0.1.1. Treat any of these as compromised.

How do I remediate malvin-wa if I installed it?

Remove malvin-wa 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 malvin-wa — how do I know if it already compromised me?

If malvin-wa 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 malvin-wa across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for malvin-wa (2 malicious versions).

Malicious package

malvin-wanpm

Advisory published Oct 27, 2026Updated Nov 9, 2026

malvin-wa is a confirmed malicious npm package (MAL-2026-18989) that executes malicious code on install (malicious versions 0.1.0, 0.1.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in malvin-wa (npm)

MAL-2026-18989

Immediate action

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

npm uninstall malvin-wa

What this malware does

malvin-wa 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) 120363397787532298@newsletter, 120363401425960788@newsletter, 120363401712599053@newsletter, 120363402984117316@newsletter, 120363403088190386@newsletter, 120363403341539432@newsletter and 1 more, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Malicious versions

2 flagged

0.1.00.1.1

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for malvin-wa (2 malicious versions).
If you installed it — respond
Remove malvin-wa 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 malvin-wa 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. malvin-wa on npm has been identified as a malicious package (versions 0.1.0, 0.1.1 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 malvin-wa-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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