MAL-2026-10626

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@react-case/option/MAL-2026-10626.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-10626
Published
2026-07-15T01:09:12Z
Modified
2026-07-15T05:19:39Z
Summary
Malicious code in @react-case/option (npm)
Details

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

Source: amazon-inspector (c4beffda94b8ea554f153faaf508da7906f78d821d45d2fca7b7b61180740269)

The package's main entrypoint (index.js) is heavily obfuscated with a string-array + RC4-style decoder that reconstructs all API names and the target URL at runtime. On module load it requires fs, os, path, crypto, and child_process, performs an HTTP GET against the runtime-reconstructed remote host, splits the response on ':', decrypts the parts with createDecipheriv using a hardcoded key/IV, writes the resulting bytes to a file under os.homedir(), and executes that file via child_process with cwd set to the user's home directory and windowsHide:true. The package ships no README, has an empty description and empty author metadata, and there is no legitimate library functionality — the only effect of requiring it is fetch-decrypt-write-exec of attacker-controlled code on the installer's machine.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-010591",
            "import_time": "2026-07-15T01:37:34.905783272Z",
            "modified_time": "2026-07-15T01:09:12Z",
            "sha256": "c4beffda94b8ea554f153faaf508da7906f78d821d45d2fca7b7b61180740269",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @react-case/option

Package

Name
@react-case/option
View open source insights on deps.dev
Purl
pkg:npm/%40react-case/option

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": "e3e7b2e8b98ba8d52f781c1c1ebc8299bdc85da4fc2e5f50be38685a76d03775",
            "tlsh": "92b297c83fc1b0d04627b0fba95b6594e13a6cccb38c9449f7a6f068fd58314e566b68"
        }
    ],
    "package_integrity": [
        {
            "filename": "option-1.0.0.tgz",
            "hashes": {
                "sha1": "e9b7f0528f0aa546952000b028143ab4a46a95c9",
                "sha512_sri": "sha512-6ZETB9EBl0lN3gr38rUSi3kTnry5O4cscqMmhCEbHihBKNa+soUedUPVe3eCGLN3LYxVkYoHMNW03MYd4lUU5A=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@react-case/option/MAL-2026-10626.json"