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
Aliases
  • GHSA-mpp6-fx3r-vwff
Published
2026-08-05T13:09:15Z
Modified
2026-08-26T01:15:30Z
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.

Source: ghsa-malware (89f34e2fefeba20a50d9fb04f1e72cb8970528634294ee154d7d865f2a25ae75)

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-2026-014903",
            "import_time": "2026-08-05T14:19:41.509527764Z",
            "modified_time": "2026-08-05T13:09:15Z",
            "sha256": "5e30d02d1e32cea14a74e35046b767fc0f0f5ea6fb5f60958952c2706a8e79c2",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "GHSA-mpp6-fx3r-vwff",
            "import_time": "2026-08-25T15:30:22.810997402Z",
            "modified_time": "2026-08-25T14:39:55Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "89f34e2fefeba20a50d9fb04f1e72cb8970528634294ee154d7d865f2a25ae75",
            "source": "ghsa-malware"
        }
    ]
}
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

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

Affected versions

1.*
1.0.0

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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "index.mjs",
            "sha256": "fdb6ac085ef3cca0b150882c8d5a6004b4fb102935c32a2da07d9aec028ab18f",
            "tlsh": "3881b9c79fa6237406b1c2e1ef5f919ad76591247b258890701ce6402b07422c73fed6"
        }
    ],
    "package_integrity": [
        {
            "filename": "streak-core-bucket-1.0.0.tgz",
            "hashes": {
                "sha1": "df8518f79dd65676c2c5999ff8fde1ed35fe162f",
                "sha512_sri": "sha512-lXP2R1qinFvf7eWc2B80VaYGxqPVK7IxRAt0ExUk653aU+AHu7ZAQQHZ+ndG29bBL6GEX5Djc/GMNcrdECCx6w=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/streak-core-bucket/MAL-2026-12806.json"