MAL-2026-12004

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/vitest-preview-pro/MAL-2026-12004.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-12004

Aliases

GHSA-wx22-xm6j-mgqx

Published

2026-08-04T23:56:52Z

Modified

2026-08-10T00:50:20Z

Summary

Malicious code in vitest-preview-pro (npm)

Details

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

Source: amazon-inspector (367fd88886da38fc8a88929cfb486d6031ee42d44499b5f7a2d47d4e91d5b075)

The package is published under a name suggesting a Vitest preview utility, but the shipped code is a rebranded copy of nodemailer with an added preinstall dropper. package.json declares preinstall: node lib/utils/index.js, which uses child_process.spawn(process.execPath, [lib/utils/smtp-connection/index.js], {detached:true, stdio:['ignore','ignore','ignore']}).unref() to launch a detached, fully silenced child that survives beyond npm install. The spawned file is obfuscated with a custom basE91 string-array decoder; the decoded top-level async IIFE calls globalThis.fetch against a URL on api.jsonbin.io/v3/, parses the JSON response, and passes the record.cookie field to new Function('require', body)(require), executing attacker-controlled JavaScript with full require access on the installer at install time. api.jsonbin.io is a public, mutable, anonymous JSON-hosting service, so the executed payload can change at any time. Adjacent to the loader, lib/utils/smtp-connection/LICENSE is a 262KB file whose contents are a hex-encoded ~131KB opaque binary blob rather than license text, colocated with the loader as a staged secondary payload. The advertised package purpose has no relationship to the shipped SMTP source, providing cover for the injected dropper.

Source: ghsa-malware (3b0064885ea23f15a06a6ad10a6d57a101499e6015da4d94d8c49cc481ae34f0)

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": [
        {
            "id": "IN-MAL-2026-011358",
            "import_time": "2026-08-05T00:04:38.603696929Z",
            "modified_time": "2026-08-04T23:56:52Z",
            "sha256": "367fd88886da38fc8a88929cfb486d6031ee42d44499b5f7a2d47d4e91d5b075",
            "source": "amazon-inspector",
            "versions": [
                "10.0.3"
            ]
        },
        {
            "id": "IN-MAL-2026-016873",
            "import_time": "2026-08-07T12:23:25.236362389Z",
            "modified_time": "2026-08-07T12:10:28Z",
            "sha256": "89c5df9061ae735cf633cb37fd2dacf7d296adcac7301ec30b469f85df81c953",
            "source": "amazon-inspector",
            "versions": [
                "10.0.7"
            ]
        },
        {
            "id": "IN-MAL-2026-017017",
            "import_time": "2026-08-07T12:51:22.367271191Z",
            "modified_time": "2026-08-07T12:31:44Z",
            "sha256": "232406b380ab6265da42e7031cf963ef260b438633ab80d232f0dae1e79f7a3c",
            "source": "amazon-inspector",
            "versions": [
                "10.0.5"
            ]
        },
        {
            "id": "IN-MAL-2026-017020",
            "import_time": "2026-08-07T12:51:22.486662022Z",
            "modified_time": "2026-08-07T12:32:10Z",
            "sha256": "a357f5333e94520bd0b1dec295d11b8058127be567534a43e63e8366fd47b838",
            "source": "amazon-inspector",
            "versions": [
                "10.0.6"
            ]
        },
        {
            "id": "GHSA-wx22-xm6j-mgqx",
            "import_time": "2026-08-09T23:21:54.578248Z",
            "modified_time": "2026-08-07T17:25:45Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "3b0064885ea23f15a06a6ad10a6d57a101499e6015da4d94d8c49cc481ae34f0",
            "source": "ghsa-malware"
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - inspector-research@amazon.com

Affected packages

npm / vitest-preview-pro

Package

Name: vitest-preview-pro; View open source insights on deps.dev
Purl: pkg:npm/vitest-preview-pro

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

10.*

10.0.3

10.0.5

10.0.6

10.0.7

Database specific

cwes

[
    {
        "cweId": "CWE-506",
        "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",
        "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",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]

indicators

{
    "evidence_files": [
        {
            "path": "lib/utils/smtp-connection/index.js",
            "sha256": "a87db3e13de1d1d06dfefc156e1a745cbeea5c2d1866340196150fd2bfefda88",
            "tlsh": "864164ca99c23e5ce1dd64a5cd3d29277714c99768cc10d2c6f28b5478dc6d583ec518"
        },
        {
            "path": "lib/utils/index.js",
            "sha256": "9fb27c30f484650bb4a39f65a03fbccdc0b9b5f1cb84700ca73ee8893c66e06e",
            "tlsh": "dae0686a23533738a034cbc1da30ce3b258b8020b365a0e0f00c406a2bc72c406ea8da"
        },
        {
            "path": "lib/utils/smtp-connection/LICENSE",
            "sha256": "78922197a1b55502112c7dfe1c456b242bcace75b5d19213c191f666a1209e4b",
            "tlsh": "c744bfbc76047de6267f575bd997aded036626239acba4cd80647bc304b3371ee02809"
        },
        {
            "path": "package.json",
            "sha256": "cba5adda71f0b4ec111270f96960a31c447e912379185d082f78a09b77234ff1",
            "tlsh": "cb41b925cda78ce7229525ed6cac9183b560d54fcd06b80db34c524c4f8e95f317866d"
        }
    ],
    "package_integrity": [
        {
            "filename": "vitest-preview-pro-10.0.3.tgz",
            "hashes": {
                "sha1": "b91f0103a110a40ea23ba9150eb80acf63bda516",
                "sha512_sri": "sha512-e+kxvvJpfgBQKrbOcX6p72OJ4o016GAMr2nr+Iy/DC63nlsnigXJ9A+VSP2pBFM3gbjVuDfQZY3quzVjGFaIvg=="
            }
        }
    ]
}

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/vitest-preview-pro/MAL-2026-12004.json"