MAL-2026-4775

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/wdt-erpmcp/MAL-2026-4775.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4775
Published
2026-05-21T06:46:46Z
Modified
2026-05-26T06:03:15.672344886Z
Summary
Malicious code in wdt-erpmcp (PyPI)
Details

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

Source: amazon-inspector (ec852c69947e2a2575ae37ce4a442a67dc01f7328c0c603b94c87aa84803623f)

wdt-erpmcp advertises itself as a generic MCP wrapper over the caller's Wangdian Tongda (WDT) ERP, and three of its four tools correctly read WDTAPPKEY / WDTAPPSECRET / WDTSID from the environment. The fourth tool, erppurchaseorderpush, deviates from that pattern: in wdterpmcp/erpservice.py lines 79-83, it instantiates WdtClient('ruoxi2-otc', 'e3c96189b699db691e48ef61070e151f', 'ruoxi2', 'https://api.wangdian.cn/openapi2/') with hardcoded credentials. Any caller invoking this tool submits supplier, warehouse, SKU, and price data into the author-controlled ruoxi2 WDT tenant rather than their own — the caller's purchase-order data is silently relayed to a fixed third-party account they did not configure, and the author gains the ability to observe or fabricate orders bearing caller-supplied data. The hardcoded WDT app secret is also extractable from the source, allowing any installer to call api.wangdian.cn as that tenant. The asymmetry between the three env-var-driven tools and the one hardcoded tool, together with the silent destination override, fits the silent-relay pattern.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "38284b64d04b6304f62117015635391945cc6f867656311bb6d54a13a182ecf8",
            "import_time": "2026-05-26T05:52:56.567658321Z",
            "versions": [
                "0.1.7"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-004610",
            "modified_time": "2026-05-25T08:57:43Z"
        },
        {
            "sha256": "ec852c69947e2a2575ae37ce4a442a67dc01f7328c0c603b94c87aa84803623f",
            "import_time": "2026-05-26T05:51:16.360066754Z",
            "versions": [
                "0.1.5"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-003765",
            "modified_time": "2026-05-21T06:46:46Z"
        },
        {
            "sha256": "feefb8fb1658f7c81f142a2d83101cd03364d149842a5a2e115f3deb2d8594ce",
            "import_time": "2026-05-26T05:52:56.675642624Z",
            "versions": [
                "0.1.6"
            ],
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-004611",
            "modified_time": "2026-05-25T08:57:49Z"
        }
    ]
}
References
Credits

Affected packages

PyPI / wdt-erpmcp

Package

Name
wdt-erpmcp
View open source insights on deps.dev
Purl
pkg:pypi/wdt-erpmcp

Affected ranges

Affected versions

0.*
0.1.5
0.1.6
0.1.7

Database specific

cwes 
[
    {
        "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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "sha256": "3aaa00a08ad096b1e312bb219d8623b8b2d98d3176d626f865076cdc92ab1303",
            "tlsh": "c391012acd96d40154ff8ba6ac2c8049f62c539332741192fd3d07292f38f959a76ef9",
            "path": "wdt_erpmcp/erp_service.py"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha256": "c0e90406918f882a5669ceab9ad64a526cc37158d518190928b8d452cef7661f",
                "blake2b_256": "5c1a83815961e8fb58bdc9e50fe32de5b4143d3d467cbcf65877d42796dd6f08",
                "md5": "5cbf7bafb3a708aec1021652f53d61f3"
            },
            "filename": "wdt_erpmcp-0.1.7-py3-none-any.whl"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/wdt-erpmcp/MAL-2026-4775.json"