MAL-2026-13538

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-cli/MAL-2026-13538.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13538
Published
2026-08-07T12:27:59Z
Modified
2026-08-07T13:20:20.990912320Z
Summary
Malicious code in delivery-ci-cli (npm)
Details

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

Source: amazon-inspector (25daa792f30733f69d4530266b44c1b6ba9a5f4d11f47cce95b714792a39ca89)

On require of delivery-ci-cli, index.js loads bootstrap.js which downloads a platform-specific native binary from string-split-obfuscated Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), writes it to /var/tmp or %TEMP% under cover-story names such as.cache<hex>, dotnetdiag<hex>.exe, and.analytics_state, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe with unref(). No hash or signature verification is performed. If HTTPS mirrors fail, _bootstrap.js falls back to a DNS-TXT covert channel: it queries TXT records at c.<domain> and 0.<domain>..N.<domain> under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru, base64-decodes the concatenated response into a buffer, writes it to disk, and executes it. Hostnames and API names are assembled at runtime via array.join to evade static string matching. The package README presents it as a benign 'CI CLI SDK' with empty dependencies, which serves as cover for the dropper behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-016992",
            "import_time": "2026-08-07T12:51:21.288204249Z",
            "sha256": "25daa792f30733f69d4530266b44c1b6ba9a5f4d11f47cce95b714792a39ca89",
            "modified_time": "2026-08-07T12:27:59Z",
            "versions": [
                "35.3.5"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / delivery-ci-cli

Package

Name
delivery-ci-cli
View open source insights on deps.dev
Purl
pkg:npm/delivery-ci-cli

Affected ranges

Affected versions

35.*
35.3.5

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-/7BGdbG9XvVDGLkEY5Xc49nSAHSw9rbCg9FvZaVvcyisQwsM/KLKF77yanO/5sE6JFNLAonrInxEsVxJjgy4oQ==",
                "sha1": "20f8c839ca932d22184a9a64916685da08e1701c"
            },
            "filename": "delivery-ci-cli-35.3.5.tgz"
        }
    ],
    "evidence_files": [
        {
            "sha256": "157dd8be90fc19e6563fe057c1a1be7756adb6f0848cec41abe1342371df8b81",
            "path": "_bootstrap.js",
            "tlsh": "58a1869a167670184bb0ebe4c7174416fa5ae6633781c284fb9c69941fb3124c3b2efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-cli/MAL-2026-13538.json"