MAL-2026-18603

    Dashboard / Malicious Package / MAL-2026-18603

    MAL-2026-18603

    Published: 4 Nov 2026Last Modified: 4 Nov 2026

    Summary: Malicious code in @ifasn/ms-doc-mcp (npm)

    Details: 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.

    References: https://www.npmjs.com/package/@ifasn/ms-doc-mcp/v/2.0.9, https://www.npmjs.com/package/@ifasn/ms-doc-mcp/v/2.1.1

    Affected packages

    Package

    Name: @ifasn/ms-doc-mcp

    Purl: pkg:npm/%40ifasn/ms-doc-mcp

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    2.0.9