MAL-2026-16220

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/jexkcode/MAL-2026-16220.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16220
Aliases
  • GHSA-j72h-3h5h-43v5
Published
2026-09-16T00:00:00Z
Modified
2026-09-30T05:45:37Z
Summary
Malicious code in jexkcode (npm)
Details

Versions 1.0.1 through 1.1.4 of jexkcode automatically follow a hard-coded WhatsApp newsletter whenever a WhatsApp connection opens. The package waits three seconds and calls newsletterFollow without obtaining user consent or exposing a configuration option. The README advertises newsletter support but does not disclose this automatic account modification. Versions through 1.1.1 used a malformed newsletter JID; version 1.1.2 corrected it. Subsequent commits removed both failure and success logs, so version 1.1.4 performs the automatic follow without visible output. This behavior is unrelated to the package's stated functionality and modifies the user's WhatsApp account without authorization.

-= Per source details. Do not edit below this line.=-

Source: ghsa-malware (8f980863fb53dc94d2a73765b57ce8f4224675d722d63f3a9381eb8044415072)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "GHSA-j72h-3h5h-43v5",
            "import_time": "2026-09-30T05:28:03.50619394Z",
            "modified_time": "2026-09-30T05:21:28Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "8f980863fb53dc94d2a73765b57ce8f4224675d722d63f3a9381eb8044415072",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / jexkcode

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.1
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "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/jexkcode/MAL-2026-16220.json"