MAL-2026-12403

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/node-cache-multithread/MAL-2026-12403.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12403
Published
2026-08-05T13:05:21Z
Modified
2026-08-05T13:35:39Z
Summary
Malicious code in node-cache-multithread (npm)
Details

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

Source: amazon-inspector (09be7b43b4fe5e0c786fb116e4a99518c46825e2b18b5e65eca88c51470b07a0)

index.js, the package's declared main entry, is a ~23KB obfuscator.io RC4/base64 string-array bundle whose top-level IIFE runs on require(). It requires fs, os, path, child_process, and an HTTP client; builds a hardcoded remote URL from four numeric octets and a port (concealed inside the 314-entry string array); fetches a payload; splits the response into IV and ciphertext on ':'; decrypts with a hardcoded key via crypto.createDecipheriv; writes the plaintext to a file under os.tmpdir(); and spawns/execs it through child_process with windowsHide:true. The package advertises itself in the README as @array-util/nodepull while publishing under the name node-cache-multithread, so a developer following the README will install/require a differently-named tarball whose only shipped file is the dropper. No cache/library functionality is present.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-014877",
            "import_time": "2026-08-05T13:08:52.55199413Z",
            "modified_time": "2026-08-05T13:05:21Z",
            "sha256": "09be7b43b4fe5e0c786fb116e4a99518c46825e2b18b5e65eca88c51470b07a0",
            "source": "amazon-inspector",
            "versions": [
                "1.1.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / node-cache-multithread

Package

Name
node-cache-multithread
View open source insights on deps.dev
Purl
pkg:npm/node-cache-multithread

Affected ranges

Affected versions

1.*
1.1.3

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": "10f932f2a7be5c474824eb078a881c5276dddb58c5ba12091bb65bc7b82f8e59",
            "tlsh": "78b296cc3bd2b0948227b0b76d2ba595e16a6cdcb7cc8444f752b058fd58318f17ab98"
        },
        {
            "path": "README.md",
            "sha256": "37141caeb02b15d0ab9c57f9ac1369d5af348ff4633c07eb66f328dd3dae868d",
            "tlsh": "f1b0124dcba3507b26412ee9741900df7353c8075500084120475caa1b919d8b30b0ee"
        }
    ],
    "package_integrity": [
        {
            "filename": "node-cache-multithread-1.1.3.tgz",
            "hashes": {
                "sha1": "bd601e1bd55677ef03c6eb1fc5fca8231439e7b6",
                "sha512_sri": "sha512-Jm+veZfFfVguqfjNUO1fNK3PsHsHmFMFODLxAMZOq+CVI31QluQknjmKDlou5+lxuCPmY3XSQzqKGMpOTRnPDg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/node-cache-multithread/MAL-2026-12403.json"