MAL-2026-13720

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eth-library-toolkit/MAL-2026-13720.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13720
Aliases
  • GHSA-mqxc-259c-25w3
Published
2026-08-10T15:52:18Z
Modified
2026-08-11T12:30:12.849845546Z
Summary
Malicious code in eth-library-toolkit (npm)
Details

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

Source: amazon-inspector (70d6b0e13b9995ecb7e5565f8515bdc8148d417fbb797e8a5bd12dcf0d7fbfff)

eth-library-toolkit@2.1.3 presents itself as @ethereumjs/util — README, badges, and the repository URL point at the ethereumjs/ethereumjs-monorepo — but is published under an unaffiliated npm account (azeura azeura@gmail.com). The package's dist/index.js unconditionally executes require("commonjs-assertion") at load time, and package.json declares "commonjs-assertion": "^1.2.7" as a runtime dependency in place of the upstream ethjs-util dependency used by the real @ethereumjs/util. commonjs-assertion is not an ethereumjs project and has no functional relationship to the utility APIs this package advertises. Any consumer that installs and requires eth-library-toolkit will resolve and execute whatever code commonjs-assertion currently ships, giving the substituted package arbitrary code execution inside the installer's Node.js process. The impersonation shell plus forced third-party dependency load matches the lookalike-clone-as-delivery-vehicle supply-chain pattern.

Source: ghsa-malware (f0a14281d04c1441978bfb667f8ccb2a937f813404c0afff5dff33cb61b129cf)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "import_time": "2026-08-11T00:38:01.344628712Z",
            "id": "GHSA-mqxc-259c-25w3",
            "sha256": "f0a14281d04c1441978bfb667f8ccb2a937f813404c0afff5dff33cb61b129cf",
            "modified_time": "2026-08-10T15:52:19Z",
            "source": "ghsa-malware"
        },
        {
            "id": "IN-MAL-2026-017305",
            "import_time": "2026-08-11T12:23:06.672769368Z",
            "sha256": "70d6b0e13b9995ecb7e5565f8515bdc8148d417fbb797e8a5bd12dcf0d7fbfff",
            "versions": [
                "2.1.3"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-11T12:01:07Z"
        }
    ]
}
References
Credits

Affected packages

npm / eth-library-toolkit

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.1.3

Database specific

cwes 
[
    {
        "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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "dist/index.js",
            "tlsh": "6251cd1b3658b8f583f860f81b2bd1c3f931593301b29a24866cd7f4dda698a85f4e1d",
            "sha256": "9474e5a27ba0e8a4f59dbf61e72299c1251de6b292eb7867d558579c6f65de7e"
        },
        {
            "path": "package.json",
            "tlsh": "5c317630cd6c9ea30fc8199558be1283a175590b8d94fc0933aa432d4f9e66f21bd75e",
            "sha256": "f8405c4238a26157bce811e310cfc6df779ecc0b42ab61d22eda5c99e7b9a40c"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eth-library-toolkit/MAL-2026-13720.json"