MAL-2026-12676

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-microforms/MAL-2026-12676.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12676
Published
2026-08-05T13:55:51Z
Modified
2026-08-05T14:36:21.118953552Z
Summary
Malicious code in delivery-ci-microforms (npm)
Details

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

Source: amazon-inspector (3ffef831e876b8114ebfd6559d38f34d2c559dd42263845899e45ee621aa15c7)

On require('delivery-ci-microforms'), index.js loads support.js which selects a platform-specific endpoint whose hostname is reassembled at runtime from split string arrays, fetches an opaque binary from oob-worker.cf100-416.workers.dev, cf99-9b3.workers.dev, or cf102-baf.workers.dev, or falls back to a chunked base64 payload carried in DNS TXT records under *.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under deceptive names such as dotnetdiag<hex>.exe and.cache<hex>, chmod 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true, stdio:'ignore'}) or spawn('cmd',...) on Windows. lib/telemetry.js additionally reassembles the 'childprocess' module name from a split string ('child' + 'process') to defeat static inspection, and the drop path is gated behind opt-out env checks (DISABLETELEMETRY, ANALYTICSOPTOUT, DONOT_TRACK) with an 'analytics' cover-story naming scheme. Installing or requiring the package auto-executes attacker-controlled code from ephemeral Cloudflare Workers hosts on the installer's machine.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015097",
            "import_time": "2026-08-05T14:20:01.64554545Z",
            "sha256": "3ffef831e876b8114ebfd6559d38f34d2c559dd42263845899e45ee621aa15c7",
            "modified_time": "2026-08-05T13:55:51Z",
            "versions": [
                "35.3.5"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / delivery-ci-microforms

Package

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

Affected ranges

Affected versions

35.*
35.3.5

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-51fWp2xQp7g0kVHKILyNjjNFJovq13ptFsUF7dFOGI0L4w2MukxUSLyE8HYoILlcNnQzYvW92prSXyRLb0YGfA==",
                "sha1": "1617cf9da1f514324c0e2db282d389a44a7bcb17"
            },
            "filename": "delivery-ci-microforms-35.3.5.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_support.js",
            "sha256": "9c83d1891075e3b319f266ed26a430cc604122b8daeced3e0d49a401668a4c13",
            "tlsh": "8ba1876617a930294bb09be4c7175416f65afa633780c184fa9ca9941f7611483b2dfc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-microforms/MAL-2026-12676.json"