MAL-2026-12729

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-nx-svelte/MAL-2026-12729.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12729
Published
2026-08-05T13:48:36Z
Modified
2026-08-05T14:36:45.359216977Z
Summary
Malicious code in devplatform-nx-svelte (npm)
Details

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

Source: amazon-inspector (19a9e164d3a912ce2cb11abb935eb46fdfa9bb7ef12acbe4a305867cb8942306)

On require of the package, compat.js constructs C2 hostnames by joining split string fragments to evade static inspection, downloads a platform-specific executable from Cloudflare Workers subdomains (oob-worker.cf1**-***.workers.dev), and falls back to a DNS-TXT covert channel that reassembles base64 chunks from TXT records at c.<subdomain>.dl.wel1.ru / N.<subdomain>.dl.wel1.ru across sdk/ext/pkg/net.dl.wel1.ru. The retrieved bytes are written to a temp path with a disguised name (e.g. dotnetdiag_*.exe,.cache_*), chmodded 755 on Unix, and spawned detached via /bin/sh -c '<path> &' or cmd.exe /c start /b. Cover-story naming (markerPath 'analyticsstate', a DISABLETELEMETRY opt-out, and a no-op _l logger) frames the dropper as telemetry. The fetch targets are not the package's publisher, the payload is opaque, and there is no integrity verification. The package name resembles legitimate Nx/Svelte tooling but the shipped code performs unauthenticated remote code execution on every installer that imports it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015048",
            "modified_time": "2026-08-05T13:48:36Z",
            "source": "amazon-inspector",
            "sha256": "19a9e164d3a912ce2cb11abb935eb46fdfa9bb7ef12acbe4a305867cb8942306",
            "versions": [
                "35.6.8"
            ],
            "import_time": "2026-08-05T14:19:56.475490166Z"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-nx-svelte

Package

Name
devplatform-nx-svelte
View open source insights on deps.dev
Purl
pkg:npm/devplatform-nx-svelte

Affected ranges

Affected versions

35.*
35.6.8

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-nx-svelte/MAL-2026-12729.json"
indicators 
{
    "package_integrity": [
        {
            "filename": "devplatform-nx-svelte-35.6.8.tgz",
            "hashes": {
                "sha512_sri": "sha512-FFaWrHfWrcs/vKojfzFsNxuQN/TjlGOWTyb3KcG0lo4/lEDu+p4TT95TFMmnzEsjNeEj9KoAhFMFhjrUvvFhoQ==",
                "sha1": "84b80e700957533f27e747f477254503f7a9041f"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_compat.js",
            "sha256": "2b6b7d15bcbe23de076ba09b1e1c06a6ad7f838652a1a1e87b4fe256fd139adc",
            "tlsh": "25a1869a1666711c8bb097e4871b4816f65bf6633380c695fb9c65980fb212883b1efc"
        }
    ]
}