MAL-2026-18982

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/kazumarii-kyuuna/MAL-2026-18982.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18982
Published
2026-10-27T00:00:00Z
Modified
2026-11-09T23:15:31Z
Summary
Malicious code in kazumarii-kyuuna (npm)
Details

kazumarii-kyuuna 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) 120363421930637018@newsletter, 120363422166977077@newsletter, 120363426326511354@newsletter, 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": "286760765c355a9e77d089288813dd088f7ce69207b73035ba0b0bcee1ceb78a"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            },
            {
                "digests": {
                    "sha256": "afe0e5a25a34fb11b705c1e4ddff66837b0de96b465edd53712d78dc1262222f"
                },
                "paths": [
                    "lib/Socket/newsletter.js"
                ]
            }
        ],
        "ips": [],
        "urls": []
    }
}
References
Credits

Affected packages

npm / kazumarii-kyuuna

Package

Name
kazumarii-kyuuna
View open source insights on deps.dev
Purl
pkg:npm/kazumarii-kyuuna

Affected ranges

Affected versions

1.*
1.0.23
1.0.24

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/kazumarii-kyuuna/MAL-2026-18982.json"