MAL-2026-18603

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@ifasn/ms-doc-mcp/MAL-2026-18603.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-18603
Published
2026-11-04T06:11:33Z
Modified
2026-11-04T06:30:04Z
Summary
Malicious code in @ifasn/ms-doc-mcp (npm)
Details

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

Source: amazon-inspector (89e10b57cd0911868969f2eaaa148e203d93745c5873d17c19e92ecec24d903d)

Package advertises itself as a Markdown toolkit MCP server (TOC generation, word count, table formatting) but its main/bin entry unconditionally invokes an imdsAudit() routine at module load that probes the Alibaba Cloud instance metadata service at http://100.100.100.200. The enumeration includes RAM and IAM security-credentials endpoints (/latest/meta-data/ram/security-credentials/ and /latest/meta-data/iam/security-credentials/) using both v1 unauthenticated and v2 token-authenticated access paths, which on Alibaba Cloud return temporary role-scoped access keys. Harvested results, which can include live IAM credentials, instance-id, hostname, vpc-id, and private-ipv4, are written to stdout and to output/imds_audit.txt. Because this runs under an MCP server the stdout stream is the transport channel back to the MCP client/model, exposing the credentials beyond the local host. Code comments frame the behavior as a benign 'audit' with 'zero network return', which conflicts with both the package's declared Markdown-tooling purpose and the actual destination of the harvested data. Cloud credential enumeration is unrelated to any documented functionality of a Markdown toolkit.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-022535",
            "import_time": "2026-11-04T06:20:41.333005475Z",
            "modified_time": "2026-11-04T06:11:33Z",
            "sha256": "89e10b57cd0911868969f2eaaa148e203d93745c5873d17c19e92ecec24d903d",
            "source": "amazon-inspector",
            "versions": [
                "2.0.9"
            ]
        },
        {
            "id": "IN-MAL-2026-022537",
            "import_time": "2026-11-04T06:20:41.491406022Z",
            "modified_time": "2026-11-04T06:11:51Z",
            "sha256": "f8a9d0dad59c110339d1e7b526dfddaea8bd9121da0acdb8d7ffd299a4d10537",
            "source": "amazon-inspector",
            "versions": [
                "2.1.1"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @ifasn/ms-doc-mcp

Package

Name
@ifasn/ms-doc-mcp
View open source insights on deps.dev
Purl
pkg:npm/%40ifasn/ms-doc-mcp

Affected ranges

Affected versions

2.*
2.0.9
2.1.1

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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "e685d160b6d1780fe3024e4336d090a928ce071d4d3829b20db52198c8269a61",
            "tlsh": "4512c705f1b738350a59a1749a0bc41eb935e6033986de50f65cc2682f8d4ac96bbbfc"
        }
    ],
    "package_integrity": [
        {
            "filename": "ms-doc-mcp-2.0.9.tgz",
            "hashes": {
                "sha1": "b65455820dee98fab61211c2af0e6b971b522d59",
                "sha512_sri": "sha512-mz+A7+yzjncu4OUWkFWpH7GwOwJBXxM7NuISBMYh7HA1x67MFR0g6dD26Rc6Upvy3/zM+ysP4ddXOWy0gGd19A=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@ifasn/ms-doc-mcp/MAL-2026-18603.json"