MAL-2026-12344

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/caldora/MAL-2026-12344.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12344
Published
2026-08-05T12:55:53Z
Modified
2026-08-05T13:35:00.813040405Z
Summary
Malicious code in caldora (npm)
Details

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

Source: amazon-inspector (720ff44cbfe1253ad00e7fa884ee51d3961308d1a0e5c8b5ec7a05cef05b1b4b)

caldora@1.0.0 runs a top-level async routine in index.mjs on import. When executed on Linux with /mnt/c present (WSL) and NODE_ENV!= 'production', it assembles the URL https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/vite-dep.dat from four split string constants, fetches the opaque binary, and writes it as 'vite-native-helper.exe' into the host Windows user's Startup folder (AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup). The dropped executable will run automatically at the next Windows login, establishing persistent code execution on the Windows host from a WSL-based install. The URL is split into a='https', b='f004.backblazeb2.com', c='dp8hbvocjd2fpza', d='vite-dep.dat' to defeat naive string scanning; the WSL/non-production gate keeps the payload dormant on typical developer machines and CI while targeting WSL developer hosts. The filename masquerades as a vite helper, but the package's declared purpose and content do not require any native helper, and the destination is a third-party file host unrelated to any legitimate publisher.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T12:55:53Z",
            "versions": [
                "1.0.0"
            ],
            "sha256": "720ff44cbfe1253ad00e7fa884ee51d3961308d1a0e5c8b5ec7a05cef05b1b4b",
            "id": "IN-MAL-2026-014812",
            "import_time": "2026-08-05T13:08:48.346856201Z"
        }
    ]
}
References
Credits

Affected packages

npm / caldora

Package

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

Affected ranges

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"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/caldora/MAL-2026-12344.json"
indicators 
{
    "evidence_files": [
        {
            "path": "index.mjs",
            "sha256": "ee62025e281169845e73682fc599833399a177726c7121c8ad1779ad744d78eb",
            "tlsh": "b97195c2e3be63348bf452916a29d64f77ace6723f47c8a0545c1c102b87825c3b5e9e"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha1": "d5f3a4a3387c45827278aa43ceab0687bfa91ae7",
                "sha512_sri": "sha512-w3mY60ubeYYqpCILlTdTmmYTa6wSlttjYFm1krjGU+w8JPM8nkUWZbJk4B7RFmM3Se3kFMo2sj8Gwx1tTqIRRg=="
            },
            "filename": "caldora-1.0.0.tgz"
        }
    ]
}