MAL-2026-3653

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@design-system-coopeuch/web/MAL-2026-3653.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-3653
Published
2026-05-13T02:46:17Z
Modified
2026-05-15T07:52:17.599724Z
Summary
Malicious code in @design-system-coopeuch/web (npm)
Details

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

Source: amazon-inspector (a871445c3913d747a2f1383bcfdac02d6dec26ddb2053260340284cf4ee02233)

Package @design-system-coopeuch/web@999.0.4 is a dependency-confusion squat of an internal-looking scope, published at an inflated 999.x version to override any private registry copy. package.json declares a preinstall hook that runs cb.js, which collects installer host identifiers (os.hostname(), cwd, install directory, id, uname -a, OS release info, and the full list of process.env key names) and POSTs them as JSON over cleartext HTTP to a hardcoded bare IP, http://157.173.126.113:8443/dep-confusion (cb.js line 20: hostname: "157.173.126.113", port: 8443, path: "/dep-confusion", method: "POST"). The beacon fires automatically on npm install without user consent. Although the package description self-labels as an "authorized bug bounty PoC," any unintended installer has their host fingerprint exfiltrated to an attacker-controlled endpoint. The combination of internal-scope impersonation, inflated version, and install-time beacon to a bare IP is the canonical dependency-confusion attack shape.

Source: ossf-package-analysis (e91609499d64cf31c94ddc3047d4c189c64e8e5f09c3da98cb3fec5c05978823)

The OpenSSF Package Analysis project identified '@design-system-coopeuch/web' @ 999.0.0 (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": "e91609499d64cf31c94ddc3047d4c189c64e8e5f09c3da98cb3fec5c05978823",
            "import_time": "2026-05-13T09:07:58.812691011Z",
            "source": "ossf-package-analysis",
            "modified_time": "2026-05-13T02:46:17Z",
            "versions": [
                "999.0.0"
            ]
        },
        {
            "sha256": "a871445c3913d747a2f1383bcfdac02d6dec26ddb2053260340284cf4ee02233",
            "id": "IN-MAL-2026-002780",
            "source": "amazon-inspector",
            "modified_time": "2026-05-14T21:28:49Z",
            "versions": [
                "999.0.4"
            ],
            "import_time": "2026-05-15T07:37:19.848171132Z"
        },
        {
            "sha256": "a9cb49ff96b31bfe45dc71bbdb2da10deebbce669349ee716dc54ca2bc5730e6",
            "id": "IN-MAL-2026-002778",
            "source": "amazon-inspector",
            "modified_time": "2026-05-14T21:07:29Z",
            "versions": [
                "999.0.0"
            ],
            "import_time": "2026-05-15T07:37:19.664320794Z"
        },
        {
            "sha256": "c6a5d517f4c553ff117601cad9013ed774327d5054716118f863158b963f4098",
            "id": "IN-MAL-2026-002748",
            "source": "amazon-inspector",
            "modified_time": "2026-05-14T19:25:43Z",
            "versions": [
                "999.0.0"
            ],
            "import_time": "2026-05-15T07:37:18.776464529Z"
        },
        {
            "sha256": "4490514d2a58551410f3fba0ab3425151aab2ec7bdf0490cbd64629032c839eb",
            "id": "IN-MAL-2026-002749",
            "source": "amazon-inspector",
            "modified_time": "2026-05-14T19:25:44Z",
            "versions": [
                "999.0.4"
            ],
            "import_time": "2026-05-15T07:37:18.854288051Z"
        },
        {
            "sha256": "9f2dd3bd8d9cb5f43df394f4fd5b3e7673db125dca15b969d6d115cd3f255bca",
            "id": "IN-MAL-2026-002779",
            "source": "amazon-inspector",
            "modified_time": "2026-05-14T21:09:00Z",
            "versions": [
                "999.0.0"
            ],
            "import_time": "2026-05-15T07:37:19.708610392Z"
        }
    ]
}
References
Credits

Affected packages

npm / @design-system-coopeuch/web

Package

Name
@design-system-coopeuch/web
View open source insights on deps.dev
Purl
pkg:npm/%40design-system-coopeuch/web

Affected ranges

Affected versions

999.*
999.0.0
999.0.4

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@design-system-coopeuch/web/MAL-2026-3653.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "sha256": "e0a192b06e2e1f7fe414a639db042f1cc36e0553438d862960d58c45d351383a",
            "tlsh": "390175f0b3d9abf035e571a0b0f20400f2a3c8697207b4d057c405f566ce57840322dd",
            "path": "cb.js"
        },
        {
            "sha256": "fff99c4797738dbb4fc2967a1d5f2a70444ffceab004b5497e6be5fb4be06da9",
            "tlsh": "c3d0973a0904a43320c807e014744001e260dc2f0100de288bc30068c22a7b3437bb0e",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "filename": "web-999.0.4.tgz",
            "hashes": {
                "sha1": "c22ac630a1390f8b178093865b23e858737a29d2",
                "sha512_sri": "sha512-iMZekSgCa3lCdCzXHw79aDx0QnM5JKARpeVoHRx96rqCM5c7rkb82NyyCvy+QYNj5MYFeGDnFFGjPFykzhgxgA=="
            }
        }
    ]
}