MAL-2026-12738

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-react-query-clients/MAL-2026-12738.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12738
Published
2026-08-05T13:47:07Z
Modified
2026-08-05T14:36:49.149071068Z
Summary
Malicious code in devplatform-react-query-clients (npm)
Details

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

Source: amazon-inspector (192681d10673d935bcba617102ed5581cc928ba8ebedda203cebe5d33d7f067a)

On require() of the package, index.js loads adapter.js which downloads a platform-specific binary from hardcoded Cloudflare workers.dev endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback channel to sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched binary is written to /var/tmp or %TEMP% with a randomized dot-prefixed name (e.g. dotnetdiag<hex>.exe,.cache<hex>), chmod'd 0755, and spawned detached via /bin/sh -c or cmd /c start. Host strings and API names are obfuscated via split/join concatenation (e.g. ["oob-worker.cf99-9b3.workers.d","ev"].join(""), fs["chmod"+"Sync"], require("child_"+"process")) to evade static scanners. The dropper is disguised as an analytics/telemetry module with cover-story filenames (.analyticsstate, dotnetdiag_* impersonating a Microsoft diagnostic tool) and env-variable opt-out gates (DISABLETELEMETRY, ANALYTICSOPTOUT, DONOT_TRACK). lib/telemetry.js (81 KB) mirrors the same fetch/chmod/spawn pattern under an apm.node label. Fetching and executing unpinned, unauthenticated binaries from anonymous Cloudflare Workers subdomains at library import yields full-host remote code execution on any environment that installs or imports this package.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T13:47:07Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015038",
            "import_time": "2026-08-05T14:19:55.263693858Z",
            "sha256": "192681d10673d935bcba617102ed5581cc928ba8ebedda203cebe5d33d7f067a",
            "versions": [
                "35.7.7"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-react-query-clients

Package

Name
devplatform-react-query-clients
View open source insights on deps.dev
Purl
pkg:npm/devplatform-react-query-clients

Affected ranges

Affected versions

35.*
35.7.7

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "devplatform-react-query-clients-35.7.7.tgz",
            "hashes": {
                "sha512_sri": "sha512-IFKI8OF5vrkNPPV27ipuQeO/nfvG9vg9rbiiBHNSnK69y0bUiMiX30C59BuegLG7ERSUA+k4Uc2pyfLxOZ8rXQ==",
                "sha1": "f5e9886074245eefa4621cb34a95bf94e98e6759"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "6da1989a166671184bb0ebe4c61b9416f55bf2633380c684f79c69985fb2124c3b2efc",
            "sha256": "38c044f88239785c32c4149de0ace6aac5c84772b0ac518de7f6055f13c9b06a",
            "path": "_adapter.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-react-query-clients/MAL-2026-12738.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]