MAL-2026-18981

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/itssofc/MAL-2026-18981.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18981
Published
2026-10-27T00:00:00Z
Modified
2026-11-09T23:15:31Z
Summary
Malicious code in itssofc (npm)
Details

itssofc 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/autofollow-newsletters.js sends the WhatsApp w:mex FOLLOW query and then MUTE, so the channel goes unnoticed, for a list downloaded at runtime from https://raw.githubusercontent.com/kyizz-hue/baileys-corp/refs/heads/main/news.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Database specific 
{
    "iocs": {
        "domains": [
            "raw.githubusercontent.com"
        ],
        "files": [
            {
                "digests": {
                    "sha256": "f9f5b17dde440490f48491177717353d1a26d231cfaf2afd10ab3d762dabb8c7"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            },
            {
                "digests": {
                    "sha256": "28c5fd6c37906392a810f3f204bec6be8ae7773422a3eb5a39a6b9afe14ca97c"
                },
                "paths": [
                    "lib/autofollow-newsletters.js"
                ]
            }
        ],
        "ips": [],
        "urls": [
            "https://raw.githubusercontent.com/kyizz-hue/baileys-corp/refs/heads/main/news.json"
        ]
    }
}
References
Credits

Affected packages

npm / itssofc

Package

Name
itssofc
View open source insights on deps.dev
Purl
pkg:npm/itssofc

Affected ranges

Affected versions

1.*
1.2.13

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/itssofc/MAL-2026-18981.json"