MAL-2026-15925

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tailwind-contact-forms/MAL-2026-15925.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15925
Published
2026-09-04T06:48:54Z
Modified
2026-10-05T16:31:38Z
Summary
Malicious code in tailwind-contact-forms (npm)
Details

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

Source: amazon-inspector (956943b584d41e6307a8bb5bfdd821bd062f5f9f4776b912ee05ce41fe1829e5)

The package is published under a name that mimics the Tailwind CSS forms plugin and its package.json points repository at tailwindlabs/tailwindcss-forms, while the actual main entry src/index.js is a heavily obfuscated Node loader (obfuscator.io-style rotated string array _0x18ab with 303 entries, decoder _0x35ba, control-flow-object dispatch). On require(), the loader constructs an Etherscan-style indexer URL and Ethereum JSON-RPC endpoint list (eth.blockscout, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) from decoded string fragments, queries eth_blockNumber / eth_getBlockByNumber / eth_getTransactionCount and the txlist API for hardcoded attacker addresses (0xa322E5f3...9aDC2490Ef and 0x...D311D3080e...6f0121063e), and assembles a runtime code payload injected via global['_V...']/global['_t_u']/global['_t_s']/global['_H']/global['_H2']. The loader imports node:child_process.spawn to execute the retrieved payload. This is the EtherHiding pattern: the attacker updates transaction data on-chain to rotate second-stage code without republishing the package, and every consumer that loads tailwind-contact-forms in their tailwind.config.js executes whatever the attacker's on-chain transaction currently points to. A Tailwind plugin has no legitimate need for obfuscation, Ethereum RPC access, block-explorer indexers, or child_process spawning.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-019640",
            "import_time":  "2026-09-04T06:53:31.795019554Z",
            "modified_time":  "2026-09-04T06:48:54Z",
            "sha256":  "0ec029f2c6cc211c953394dfe89a4ba0921f1a526ca2b0235672f6fdeca10c50",
            "source":  "amazon-inspector",
            "versions":  [
                "0.5.12"
            ]
        },
        {
            "id":  "IN-MAL-2026-020492",
            "import_time":  "2026-09-23T14:19:31.892811335Z",
            "modified_time":  "2026-09-23T14:10:59Z",
            "sha256":  "6d82b6065d9e3d4a4ebba479ed42deb342f72c48d2d69d297f3926c0225828aa",
            "source":  "amazon-inspector",
            "versions":  [
                "0.5.1"
            ]
        },
        {
            "id":  "IN-MAL-2026-020786",
            "import_time":  "2026-09-30T01:36:51.449031654Z",
            "modified_time":  "2026-09-30T01:27:40Z",
            "sha256":  "956943b584d41e6307a8bb5bfdd821bd062f5f9f4776b912ee05ce41fe1829e5",
            "source":  "amazon-inspector",
            "versions":  [
                "0.5.5"
            ]
        },
        {
            "id":  "IN-MAL-2026-021079",
            "import_time":  "2026-10-05T16:22:57.008828579Z",
            "modified_time":  "2026-10-05T16:14:44Z",
            "sha256":  "36808a08f61e6af080a534ddf1387767136fbd9b35257ab945fe8881f04a43e4",
            "source":  "amazon-inspector",
            "versions":  [
                "0.5.9"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / tailwind-contact-forms

Package

Name
tailwind-contact-forms
View open source insights on deps.dev
Purl
pkg:npm/tailwind-contact-forms

Affected ranges

Affected versions

0.*
0.5.1
0.5.5
0.5.9
0.5.12

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    },
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    },
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    },
    {
        "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":  "901605dc8863d7b3ad4b767d27847881c70a6d9ccb96dc6f3e2a40db779bfb02",
            "tlsh":  "b103c906bac13571234b5f7b760bf4e4e02e2d9d7698048bd129bc94f961329d8e2b39"
        },
        {
            "path":  "package.json",
            "sha256":  "5c99aaa1c44832939389b4f27a7b10aec4d559021aab7d02d031fe80ea536e6d",
            "tlsh":  "dc21cb26cd140e7701e0693696f911837297a463895cfc193396c19c8f8d6bfe0f909f"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "tailwind-contact-forms-0.5.12.tgz",
            "hashes":  {
                "sha1":  "dfd4597f50aaab8541f224eea73f4adb8be386d4",
                "sha512_sri":  "sha512-RfKyVBSVuj9Z8lmXNd6W3GDsPWyHRONhWLLxnVN40JwVbsik7EUvftW8FVV938YdtpDWolC3vQqzc9zP2IDDiA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tailwind-contact-forms/MAL-2026-15925.json"