MAL-2026-5644

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/self-certificate/MAL-2026-5644.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5644
Aliases
  • GHSA-6p47-hr8r-4wq6
Published
2026-06-11T13:02:34Z
Modified
2026-11-12T15:30:03Z
Summary
Malicious code in self-certificate (npm)
Details

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

Source: amazon-inspector (ab587fcd5a0b45e17454fc742007b8b597a0aec49b443d8a5a087ba910ea4a40)

The package presents itself as a self-signed certificate generator, but its public generateCertificates() API path loads sample/cert.pem, strips the BEGIN/END CERTIFICATE armor, base64-decodes the body, and eval()s the result. The fake PEM is not a DER certificate — it decodes to a JavaScript IIFE that fetches https://aptupdate.org/settings/privacy.php (destination itself base64-encoded for a second layer of concealment) and pipes the response into a spawned python3/python interpreter (spawn('python3'|'python', ['-'], {stdio:['pipe','ignore','ignore'], detached:true, windowsHide:true})), writes the fetched bytes to stdin, and unref()s the child so it outlives the caller. The combination of cover-story file extension, double-base64-wrapped C2 URL, detached/hidden/stdio-ignored Python execution, and eval of a payload disguised as a certificate is a deliberately concealed remote-code execution backdoor against any consumer of the advertised API.

Source: ghsa-malware (f25ae1f9b9e110e14678c136b0b03beadb230b26f03ebff7618d3e9cda139aa2)

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": "IN-MAL-2026-005730",
            "import_time": "2026-06-11T13:27:20.534148804Z",
            "modified_time": "2026-06-11T13:02:34Z",
            "sha256": "4a2141f4facbd3abc437287c86971f1b3bb6795fad75990624f735b72139167d",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "IN-MAL-2026-007653",
            "import_time": "2026-06-26T18:42:50.035074564Z",
            "modified_time": "2026-06-26T18:18:17Z",
            "sha256": "ab587fcd5a0b45e17454fc742007b8b597a0aec49b443d8a5a087ba910ea4a40",
            "source": "amazon-inspector",
            "versions": [
                "1.1.0"
            ]
        },
        {
            "id": "GHSA-6p47-hr8r-4wq6",
            "import_time": "2026-11-12T15:18:09.70677534Z",
            "modified_time": "2026-11-12T14:59:29Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "f25ae1f9b9e110e14678c136b0b03beadb230b26f03ebff7618d3e9cda139aa2",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / self-certificate

Package

Name
self-certificate
View open source insights on deps.dev
Purl
pkg:npm/self-certificate

Affected ranges

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

Affected versions

1.*
1.0.0
1.1.0

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"
    },
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "8df2981a688b04f04d130cf10c3715dec00d59b81953636d891aa2a3318e3982",
            "tlsh": "f541038579e2b96204d79674454b8050b42ce103b70aecab36de86d16f16e6cd27efcc"
        },
        {
            "path": "sample/cert.pem",
            "sha256": "67642cb874a1de4a653491c56f4c3324fc95364da43724d07399b8a453908a18",
            "tlsh": "4011d0029d972d990764f9ae14fd93c355af13c3b9e242f9489ed1a8297c09a18d8038"
        }
    ],
    "package_integrity": [
        {
            "filename": "self-certificate-1.0.0.tgz",
            "hashes": {
                "sha1": "2034d348c5e4ead18b83a05ddad6282dee19e097",
                "sha512_sri": "sha512-/fVL29/HyMgsxmH6nplNP7M52rpNhRXLmmMlSS2ulwV9yD7nz2trODTNCxzOBDLuzM18UxiiNmSEIGRGusTtfQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/self-certificate/MAL-2026-5644.json"