MAL-2026-6717

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/test-pkg-x0/MAL-2026-6717.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-6717

Published

2026-07-01T20:46:56Z

Modified

2026-07-01T21:16:41.867799381Z

Summary

Malicious code in test-pkg-x0 (npm)

Details

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

Source: amazon-inspector (0d0014944456f668a25fa484bf7cb5f36a7128d6a585b86d9294d8d49b23049a)

Package declares scripts.postinstall pointing at shim.js, a script that runs unconditionally on npm install. shim.js branches on uname -s (Darwin/MINGW/Linux) and executes OS-native commands on the installer's machine, including launching the Calculator application and opening https://github.com/X3r0Day/BunnyHijack in the installer's default browser via open / cmd /c start / xdg-open. Additionally, package.json registers a bin entry named node mapped to shim.js. Under package managers that resolve node from node_modules/.bin (notably bun), any dependency postinstall that invokes node will execute this shim instead of the real Node.js runtime; the declared dependency protoc-gen-grpc-web is used as the trigger. The combined effect is arbitrary command execution on the installer at install time, both directly via the package's own postinstall and indirectly by hijacking the node command for sibling dependencies' install scripts. The Calculator launch and browser navigation are a proof-of-concept payload; the underlying execution primitive is fully attacker-controlled.

Database specific

{
    "malicious-packages-origins": [
        {
            "versions": [
                "1.0.4"
            ],
            "sha256": "0d0014944456f668a25fa484bf7cb5f36a7128d6a585b86d9294d8d49b23049a",
            "modified_time": "2026-07-01T20:47:44Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-007896",
            "import_time": "2026-07-01T21:04:20.716755235Z"
        },
        {
            "versions": [
                "1.0.3"
            ],
            "sha256": "a85b5bbf9139048d1a42a81b40abceadeed726418faace65479f33ae2c94271f",
            "source": "amazon-inspector",
            "modified_time": "2026-07-01T20:47:34Z",
            "id": "IN-MAL-2026-007895",
            "import_time": "2026-07-01T21:04:20.676561525Z"
        },
        {
            "versions": [
                "1.0.0"
            ],
            "sha256": "aeb1efbab7d02351ac1c9de44053ede94268a1c1c361496326bad0cc265f1baa",
            "source": "amazon-inspector",
            "modified_time": "2026-07-01T20:46:56Z",
            "id": "IN-MAL-2026-007890",
            "import_time": "2026-07-01T21:04:20.297337581Z"
        },
        {
            "versions": [
                "1.0.2"
            ],
            "sha256": "c3594b48100f7bbaa17f7c16e4fe5b5098841972586311992715bf33d66ed638",
            "source": "amazon-inspector",
            "modified_time": "2026-07-01T20:47:04Z",
            "id": "IN-MAL-2026-007891",
            "import_time": "2026-07-01T21:04:20.358771887Z"
        },
        {
            "versions": [
                "1.0.1"
            ],
            "sha256": "e144deafee87e34e9d4777f9c78934cb1547e4a6dee22cc08a6ecfa560942c85",
            "source": "amazon-inspector",
            "modified_time": "2026-07-01T20:47:12Z",
            "id": "IN-MAL-2026-007892",
            "import_time": "2026-07-01T21:04:20.441482702Z"
        }
    ]
}

References

Credits

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

Affected packages

npm / test-pkg-x0

Package

Name: test-pkg-x0; View open source insights on deps.dev
Purl: pkg:npm/test-pkg-x0

Affected ranges

Affected versions

1.*

1.0.0

1.0.1

1.0.2

1.0.3

1.0.4

Database specific

indicators

{
    "package_integrity": [
        {
            "filename": "test-pkg-x0-1.0.4.tgz",
            "hashes": {
                "sha512_sri": "sha512-PjvQrzRwn/dINQx3Q6FJ/WfpDDHupftNfBad5+9o+sN6n8BLcg7sd/IH0I7vY/WXsMq/zClDe8W0T+TicXa2Og==",
                "sha1": "8086bfba46af24962e78b30389f4595cb62a0d83"
            }
        }
    ],
    "evidence_files": [
        {
            "sha256": "f9849ea2c8b097251e088a50c519eabaf85a81022b73712da40817773dba2914",
            "path": "shim.js",
            "tlsh": "13f0dda7ac6153612f0f16ac374b546e9c9513674054fca823a3c743ef4613e59c14b2"
        },
        {
            "sha256": "f7f409f00cf69edb97f12cf5616374dc4079fc69d7d1dc579702c5fe34941bb7",
            "path": "package.json",
            "tlsh": "9dd0a7508ce246b324cd39a06c29640353295e1750083c2c61d3104cdb4e6bf047ab68"
        }
    ]
}

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/test-pkg-x0/MAL-2026-6717.json"

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"
    },
    {
        "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"
    }
]