MAL-2026-18991

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mod-baileys/MAL-2026-18991.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18991
Published
2026-10-27T00:00:00Z
Modified
2026-11-09T23:15:32Z
Summary
Malicious code in mod-baileys (npm)
Details

mod-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) 120363349457176430@newsletter, 120363400706010828@newsletter, 120363421052027188@newsletter, 120363423257544642@newsletter (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": [],
        "files": [
            {
                "digests": {
                    "sha256": "150207b4d922340f0261f8bf551979f790f82e8db5441558c727f955f12cb373"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            },
            {
                "digests": {
                    "sha256": "6f47a94fd530c4c1c201eb0149fc86d69c947ee864d8c2375b80e26c8d192112"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            }
        ],
        "ips": [],
        "urls": []
    }
}
References
Credits

Affected packages

npm / mod-baileys

Package

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

Affected ranges

Affected versions

1.*
1.0.1
1.0.2
1.0.3
2.*
2.0.0

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/mod-baileys/MAL-2026-18991.json"