MAL-2026-12688

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-validate/MAL-2026-12688.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12688
Published
2026-08-05T13:55:07Z
Modified
2026-08-05T14:36:26.239132568Z
Summary
Malicious code in delivery-ci-validate (npm)
Details

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

Source: amazon-inspector (95a6fb547c4fb156493439557692dc83b73f44deee6687ec535882f7e8ccf490)

Requiring delivery-ci-validate loads _polyfill.js, which assembles destination hostnames from split string fragments joined at runtime (e.g. 'oob-'+'worker.cf100-416.workers.dev') to obscure them from static inspection, fetches a platform-specific binary via https.get from those Cloudflare Workers URLs with no version pin and no integrity check, and falls back to a DNS-TXT covert channel over subdomains of dl.wel1.ru that pulls chunked base64-encoded payload bytes. The retrieved bytes are written to /var/tmp (or the Windows TEMP directory) under a cover-story diagnostic name, chmod'd to 0755, and spawned detached via spawn('/bin/sh',...) or spawn('cmd',...). The entry point index.js requires _polyfill.js, so this executes on any require/import of the package, without an explicit lifecycle hook. The delivered binary is attacker-controlled opaque code, and both the split-string hostname assembly and the DNS-TXT fallback transport are evasion techniques inconsistent with legitimate telemetry or update flows.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015092",
            "import_time": "2026-08-05T14:20:01.096087533Z",
            "sha256": "95a6fb547c4fb156493439557692dc83b73f44deee6687ec535882f7e8ccf490",
            "modified_time": "2026-08-05T13:55:07Z",
            "versions": [
                "35.1.4"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / delivery-ci-validate

Package

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

Affected ranges

Affected versions

35.*
35.1.4

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": "sha512-7etFPPNbw688M9PE8iqbjzNYnS55Rt7tJzkzfSf+gJWjjKmXpc/7hLBqvYGwmLp6GNUyKBPXUOPcL+Y3Px/toQ==",
                "sha1": "215ed4112710e9d964b7b9f26f7a256df7fb78e9"
            },
            "filename": "delivery-ci-validate-35.1.4.tgz"
        }
    ],
    "evidence_files": [
        {
            "sha256": "075db9feeae9593f650203e2f288db5245db7fb826a0e8e42b55d3c688ce73cf",
            "path": "_polyfill.js",
            "tlsh": "04b1869a166a71188bb0dbe4c71b5416f55af66333c0c194fb9c69941fb3124c2b1dfc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-validate/MAL-2026-12688.json"