MAL-2026-12806

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/streak-core-bucket/MAL-2026-12806.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12806
Published
2026-08-05T13:09:15Z
Modified
2026-08-05T14:37:22.857937280Z
Summary
Malicious code in streak-core-bucket (npm)
Details

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

Source: amazon-inspector (5e30d02d1e32cea14a74e35046b767fc0f0f5ea6fb5f60958952c2706a8e79c2)

On import, the main entry runs a top-level async IIFE that decodes a reversed base64 URL literal to https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/service, downloads the response bytes, writes them to ~/.cache/svc/wsl with mode 0o755, and spawns the file detached with shell:true and stdio ignored. The download URL is concealed via reversed base64 to hide the destination from casual review. The behavior is framed by comments as a benign startup self-check, but the package fetches and executes an opaque remote binary from an anonymous third-party bucket on any require/import of the module.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-05T14:19:41.509527764Z",
            "id": "IN-MAL-2026-014903",
            "sha256": "5e30d02d1e32cea14a74e35046b767fc0f0f5ea6fb5f60958952c2706a8e79c2",
            "modified_time": "2026-08-05T13:09:15Z",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / streak-core-bucket

Package

Name
streak-core-bucket
View open source insights on deps.dev
Purl
pkg:npm/streak-core-bucket

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "index.mjs",
            "tlsh": "3881b9c79fa6237406b1c2e1ef5f919ad76591247b258890701ce6402b07422c73fed6",
            "sha256": "fdb6ac085ef3cca0b150882c8d5a6004b4fb102935c32a2da07d9aec028ab18f"
        }
    ],
    "package_integrity": [
        {
            "filename": "streak-core-bucket-1.0.0.tgz",
            "hashes": {
                "sha512_sri": "sha512-lXP2R1qinFvf7eWc2B80VaYGxqPVK7IxRAt0ExUk653aU+AHu7ZAQQHZ+ndG29bBL6GEX5Djc/GMNcrdECCx6w==",
                "sha1": "df8518f79dd65676c2c5999ff8fde1ed35fe162f"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/streak-core-bucket/MAL-2026-12806.json"