MAL-2026-18673

    Dashboard / Malicious Package / MAL-2026-18673

    MAL-2026-18673

    Published: 26 Oct 2026Last Modified: 5 Nov 2026

    Summary: Malicious code in @bellaxchan/sixtech (npm)

    Details: @bellaxchan/sixtech 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) 120363431475943819@newsletter (stored base64-encoded), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

    References: https://www.npmjs.com/package/@bellaxchan/sixtech, https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/

    Affected packages

    Package

    Name: @bellaxchan/sixtech

    Purl: pkg:npm/%40bellaxchan/sixtech

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.1.5
    MAL-2026-18673 | CVE-DB