MAL-2026-18988

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/malvin-baileys/MAL-2026-18988.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18988
Published
2026-10-27T00:00:00Z
Modified
2026-11-09T23:15:32Z
Summary
Malicious code in malvin-baileys (npm)
Details

malvin-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) 120363391079867105@newsletter, 120363399205146445@newsletter and a list downloaded at runtime from https://cdn.malvintech.sbs/file/chJids.json (the URL itself stored as base64 strings), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Database specific 
{
    "iocs": {
        "domains": [
            "cdn.malvintech.sbs"
        ],
        "files": [
            {
                "digests": {
                    "sha256": "7921ff0f4dbe4177589dca05821305794409a5275a6d6d9702392810d55945b6"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            },
            {
                "digests": {
                    "sha256": "a36d842ed4b1fe2b9e99c9fe1f121455115749700fe21e968a4f85c650b687f9"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            },
            {
                "digests": {
                    "sha256": "ef66ddfca95960783e5dc5e2196e6146bfa5aca764d00586ccf0ea6dc5a8a8c7"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            }
        ],
        "ips": [],
        "urls": [
            "https://cdn.malvintech.sbs/file/chJids.json"
        ]
    }
}
References
Credits

Affected packages

npm / malvin-baileys

Package

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

Affected ranges

Affected versions

2.*
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5

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/malvin-baileys/MAL-2026-18988.json"