MAL-2026-14208

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eth-batcher/MAL-2026-14208.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14208
Published
2026-08-19T02:46:03Z
Modified
2026-08-19T03:00:13Z
Summary
Malicious code in eth-batcher (npm)
Details

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

Source: amazon-inspector (e2a725b819260b649f04c27142a0c6e5d219304f6ab038f8717533c2b3416599)

index.js is a verbatim copy of an unrelated Mongoose LeanHooks Plugin with a ~149 KB obfuscated Function(...) payload concatenated onto the module.exports line. On require(), the payload constructs and executes code decoded from a hex byte table via an XOR/rotation decoder. The advertised purpose in package.json (Ethereum JSON-RPC batching) does not match the shipped code, which contains no Ethereum or Web3 logic — the mismatched benign source acts as a cover for the appended dropper. Any process that imports this package executes the decoded payload at load time.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-018299",
            "import_time": "2026-08-19T02:57:22.031790964Z",
            "modified_time": "2026-08-19T02:46:03Z",
            "sha256": "e2a725b819260b649f04c27142a0c6e5d219304f6ab038f8717533c2b3416599",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / eth-batcher

Package

Name
eth-batcher
View open source insights on deps.dev
Purl
pkg:npm/eth-batcher

Affected ranges

Affected versions

1.*
1.0.0

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": "index.js",
            "sha256": "38de1f04d737182b9c5f87d7aff8b0e6f778fe14c1407c38b915e8da2fb610fb",
            "tlsh": "0ae3bb4029927428a90dc1e245b88ffec747599ea748b85fe142e4daf1f4bf354fca18"
        }
    ],
    "package_integrity": [
        {
            "filename": "eth-batcher-1.0.0.tgz",
            "hashes": {
                "sha1": "2c222154e954a2ca6987779f8c9abc25414bfde5",
                "sha512_sri": "sha512-4B4cuRtXGA25Sm3L8tHLc4OZdHkWPAhSInQ8gxHrsfatsYmQAmjLY/yhBi52IFDeeEQ2GP4rMsGnJtGXz6U5Rw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eth-batcher/MAL-2026-14208.json"