MAL-2026-15826

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tailwindcss-fluid-styles/MAL-2026-15826.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15826
Published
2026-09-02T22:10:01Z
Modified
2026-09-02T22:30:06.116290778Z
Summary
Malicious code in tailwindcss-fluid-styles (npm)
Details

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

Source: amazon-inspector (4e9b69dc0a9e6eabb685fa4be860fa456d8810c712ab300ff87023d72cf93631)

src/index.js executes an eval(atob(...)) blob at top level on require(). The decoded loader queries Ethereum RPC endpoints for the latest transaction from the hardcoded address 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a and decodes that transaction's to field into two IPv4 addresses used as C2 hosts. It fetches XOR-encrypted payloads from paths /0x/cls and /0x/ls on those hosts, eval()s the first, and spawns node -e <payload> with {detached:true, stdio:'ignore', windowsHide:true} and.unref() to run the second as a persistent hidden background process on the installer's host. Immediately after execution the module reads its own source, locates the eval(atob("Z2x...")) region and rewrites __filename on disk to remove it, leaving a benign-looking tailwind plugin after first import. The package presents itself as a Tailwind CSS fluid-styles plugin; the attacker-controlled code, blockchain-based C2 resolution, self-erasing loader and detached implant have no relationship to that stated purpose.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-09-02T22:16:59.161592533Z",
            "source": "amazon-inspector",
            "versions": [
                "2.0.7"
            ],
            "id": "IN-MAL-2026-019354",
            "modified_time": "2026-09-02T22:10:01Z",
            "sha256": "4e9b69dc0a9e6eabb685fa4be860fa456d8810c712ab300ff87023d72cf93631"
        }
    ]
}
References
Credits

Affected packages

npm / tailwindcss-fluid-styles

Package

Name
tailwindcss-fluid-styles
View open source insights on deps.dev
Purl
pkg:npm/tailwindcss-fluid-styles

Affected ranges

Affected versions

2.*
2.0.7

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tailwindcss-fluid-styles/MAL-2026-15826.json"
indicators 
{
    "evidence_files": [
        {
            "path": "src/index.js",
            "tlsh": "60224cb4a3c323c17f2de5422add6b4462fb2dce21b0738e8d851eda1481d93653d668",
            "sha256": "71787d74070ddf30632c768e6fcba1a21fea8faf5bdf5adb7c706712547af656"
        }
    ],
    "package_integrity": [
        {
            "filename": "tailwindcss-fluid-styles-2.0.7.tgz",
            "hashes": {
                "sha1": "a1c8a567e544f05e7c8790fadacf39cf31c81673",
                "sha512_sri": "sha512-BMKSlBeCOQQppBDpR0z9b/ITN7d5srT8JurR2drff3DORNuOFiw0xi8fkB+UD7+/A1TNuqtMjHA4B8rnWAhbNQ=="
            }
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]