MAL-2026-3679

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@2oolkit/hyperliquid-cli/MAL-2026-3679.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-3679
Published
2026-05-12T07:42:47Z
Modified
2026-05-13T20:21:28.616802Z
Summary
Malicious code in @2oolkit/hyperliquid-cli (npm)
Details

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

Source: amazon-inspector (1c3af30011dcf54950f270463028270d732fce20b5cd5da44342a0748922e6df)

The package is advertised as a neutral CLI/MCP wrapper for Hyperliquid, but its distributed code silently routes value from the installer to an author-controlled address. In dist/index.js and dist/mcp.js, the constants BUILDERADDRESS = 0xa6f967d47c6f85a5ba4fc43543e5e1c171cccf98, BUILDERFEE = 1 (0.01%), and REFERRAL_CODE = '2OOLKIT' are hardcoded. On config init / config set --private-key..., a fire-and-forget silentAutoSetup(env, privateKey, walletAddress) signs and submits (a) a setReferrer('2OOLKIT') transaction and (b) an approveBuilderFee(0xa6f9...cf98, '0.1%') transaction on the user's Hyperliquid account, with errors swallowed so the user sees no indication. Additionally, HyperliquidClient.placeOrder unconditionally injects action.builder = { b: BUILDER_ADDRESS, f: BUILDER_FEE } into every order, so every trade routed through the CLI pays a builder fee to the hardcoded address in perpetuity. None of this is disclosed in the README or command output, there is no opt-out, and the behavior is triggered by the documented setup flow. This is a silent-relay pattern causing direct, ongoing financial harm to anyone who installs and uses the package with a funded wallet. The repeated POSTs flagged in dist/index.js:610 and dist/mcp.js:466 correspond to the Hyperliquid exchange submissions carrying these hardcoded builder/referrer fields.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-05-13T20:10:54.006616674Z",
            "versions": [
                "0.2.1"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-002224",
            "modified_time": "2026-05-12T19:03:07Z",
            "sha256": "1c3af30011dcf54950f270463028270d732fce20b5cd5da44342a0748922e6df"
        },
        {
            "import_time": "2026-05-13T20:10:54.072521104Z",
            "versions": [
                "0.2.2"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-002225",
            "modified_time": "2026-05-12T19:03:07Z",
            "sha256": "66215e5cdec4c1ec4dfa5fb21237998c57bfbfd96a0bcb9792b92e4c88be3f17"
        }
    ]
}
References
Credits

Affected packages

npm / @2oolkit/hyperliquid-cli

Package

Name
@2oolkit/hyperliquid-cli
View open source insights on deps.dev
Purl
pkg:npm/%402oolkit/hyperliquid-cli

Affected ranges

Affected versions

0.*
0.2.1
0.2.2

Database specific

indicators 
{
    "evidence_files": [
        {
            "tlsh": "6653a52075fa212114a3b6ae6b6b81042035f653350cec957becfbd11f9e42689b7f78",
            "sha256": "73cd6941832c612aca22f77edd9c5da8e3bea943be2ba77d3a11538523080292",
            "path": "dist/index.js"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-4NbhUFbpf6OoGv8cYFr3hOsNgMkwp1QFnHp3hChfiLBAKCRFU9zLN+coacxfyiW7PJN9xjkpm+9MD0z8DQkrHw==",
                "sha1": "1a139c96cec462bcf72c21e399097100fb7d6369"
            },
            "filename": "hyperliquid-cli-0.2.1.tgz"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@2oolkit/hyperliquid-cli/MAL-2026-3679.json"
cwes 
[
    {
        "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."
    }
]