MAL-2026-18858

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@kynna/baileys-pro/MAL-2026-18858.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18858
Published
2026-10-27T00:00:00Z
Modified
2026-11-09T23:15:23Z
Summary
Malicious code in @kynna/baileys-pro (npm)
Details

@kynna/baileys-pro 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://github.com/kagarii/Screaper/blob/main/idChannel.json, https://raw.githubusercontent.com/kagarii/Screaper/refs/heads/main/idChannel.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Database specific 
{
    "iocs": {
        "domains": [
            "github.com",
            "raw.githubusercontent.com"
        ],
        "files": [
            {
                "digests": {
                    "sha256": "9cd49b9962baac1c2abc245ee262076fafe941083ba17acfded1566d011dcf6a"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            },
            {
                "digests": {
                    "sha256": "f4588f0c64b22ef19a2946a29002b14de2df8e5c8add0cf53cb4fc792542f6a5"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            }
        ],
        "ips": [],
        "urls": [
            "https://github.com/kagarii/Screaper/blob/main/idChannel.json",
            "https://raw.githubusercontent.com/kagarii/Screaper/refs/heads/main/idChannel.json"
        ]
    }
}
References
Credits

Affected packages

npm / @kynna/baileys-pro

Package

Name
@kynna/baileys-pro
View open source insights on deps.dev
Purl
pkg:npm/%40kynna/baileys-pro

Affected ranges

Affected versions

8.*
8.0.7
8.0.8

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/@kynna/baileys-pro/MAL-2026-18858.json"