MAL-2026-16262

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tailwindcss-form-ui/MAL-2026-16262.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-16262
Published
2026-09-17T19:51:15Z
Modified
2026-09-17T20:30:05Z
Summary
Malicious code in tailwindcss-form-ui (npm)
Details

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

Source: amazon-inspector (c7a21e4623006a0c69e3dfeb80857eadd9102550c8a77c1d95e880245a5f0fa9)

Package name and repository field impersonate the legitimate tailwindlabs/tailwindcss-forms plugin, but the shipped main entry src/index.js is a fully obfuscated (obfuscator.io string-array) module that has nothing to do with Tailwind CSS. On module load it imports node:child_process (spawn), node:http/https, node:zlib and node:url, builds a list of Ethereum JSON-RPC endpoints (process.env.ETH_RPC_URL, *.publicnode.com, drpc.org, 1rpc.io/eth, blockscout) and an Etherscan-style txlist URL for the hardcoded sender address 0xa322E5f39aDC2490EfD311D3080e6f0121063e1a, and polls eth_blockNumber / eth_getBlockByNumber / eth_getTransactionCount to retrieve attacker-published transactions. The retrieved payloads are decompressed via gunzip/inflate/brotli and passed to child_process.spawn, giving whoever controls that Ethereum address arbitrary command execution on any host that requires or imports the package. The on-chain command channel is takedown-resistant. The Tailwind-forms identity, the obfuscated main, and the require-time RCE together form a cover-story typosquat delivering installer-side remote code execution.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020139",
            "import_time":  "2026-09-17T20:18:44.980237849Z",
            "modified_time":  "2026-09-17T19:51:15Z",
            "sha256":  "c7a21e4623006a0c69e3dfeb80857eadd9102550c8a77c1d95e880245a5f0fa9",
            "source":  "amazon-inspector",
            "versions":  [
                "0.5.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / tailwindcss-form-ui

Package

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

Affected ranges

Affected versions

0.*
0.5.1

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "src/index.js",
            "sha256":  "f5fd0ca9d7642087d0edf609c126197b4d958cc2e1d576c62d444287444e229d",
            "tlsh":  "9503e9957e81121a33434f7fba1bf4e4e12a1899369448c7d21cbc94f8e631ae9f6d34"
        },
        {
            "path":  "package.json",
            "sha256":  "3d69860a60dfe83778e5d2fdf8e93d8cf796283d9832663ffe00ade9c8a6c79c",
            "tlsh":  "a421c822cd140e7301e0293596f905837297a463895cf81a3396c19ccf8d6bfe0f909f"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "tailwindcss-form-ui-0.5.1.tgz",
            "hashes":  {
                "sha1":  "6ad4e9d33db7ff1f025da8ee3be606323f0f48ca",
                "sha512_sri":  "sha512-pukhSsK+8SK6vgskhwNxkr5IlhRnIEtpu84CISV2zwKNY8gQ01l8NMMDCIdoKlUMFh16b+l9O23Fe0r/6H3wiQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tailwindcss-form-ui/MAL-2026-16262.json"