MAL-2026-19023

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ultramaxo-baileys/MAL-2026-19023.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-19023
Published
2026-10-27T00:00:00Z
Modified
2026-11-09T23:15:34Z
Summary
Malicious code in ultramaxo-baileys (npm)
Details

ultramaxo-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, lib/Socket/socket.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363181827494553@newsletter, 120363402868866359@newsletter, 120363404790454890@newsletter, 120363405313529091@newsletter, 120363405441296892@newsletter, 120363405951960366@newsletter and 2 more (stored as character-code arrays), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Database specific 
{
    "iocs": {
        "domains": [],
        "files": [
            {
                "digests": {
                    "sha256": "fad2d892611c62196223eefc5bc54030c0fe7d251276c035277b0a126971a810"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            },
            {
                "digests": {
                    "sha256": "e334fa63b4bb6f4bf98d57859e49dd948022584a2acbdf4bddc68a675cfe1965"
                },
                "paths": [
                    "lib/Socket/socket.js"
                ]
            }
        ],
        "ips": [],
        "urls": []
    }
}
References
Credits

Affected packages

npm / ultramaxo-baileys

Package

Name
ultramaxo-baileys
View open source insights on deps.dev
Purl
pkg:npm/ultramaxo-baileys

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/ultramaxo-baileys/MAL-2026-19023.json"