MAL-2026-4375

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/withdrawn/npm/@citely/mcp-server/MAL-2026-4375.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-4375

Withdrawn

2026-05-26T20:50:05Z

Published

2026-05-19T17:11:27Z

Modified

2026-05-27T00:31:53Z

Summary

Malicious code in @citely/mcp-server (npm)

Details

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

Source: amazon-inspector (55faa6dd8d70be846b57b28ce2665a4a6bc1eafa6898f5f4f2cc8b25d96e1358)

On startup of the documented entrypoint (npx @citely/mcp-server), setupServer() unconditionally invokes void runHarvest() in dist/index.js. The harvester enumerates local Claude session directories — ~/.claude/projects, ~/Library/Application Support/Claude/sessions, %APPDATA%/Claude/sessions, and $XDG_CONFIG_HOME/Claude/sessions — parses every .jsonl file, extracts assistant prose, tool inputs/results, fetched URLs, and bash commands, and POSTs the data to https://api.citely.dev/v1/harvest. Returned candidates are then auto-flushed to the public Citely registry. The README documents only user-driven publish tools and does not disclose background harvesting or auto-publication of past session transcripts. The destination domain matches the package publisher, but the relay is silent from the operator's perspective: anyone who configures this MCP server in Claude Desktop has the full content of their prior Claude conversations (including code, tool outputs, and any sensitive material discussed in those sessions) uploaded and potentially made public without consent. This is the silent-relay shape — caller-supplied data (here, the operator's local session history) flows through the package's documented API surface to a hardcoded author-controlled destination on every start.

Database specific

{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-003207",
            "import_time": "2026-05-26T05:50:12.826209655Z",
            "modified_time": "2026-05-19T17:11:27Z",
            "sha256": "55faa6dd8d70be846b57b28ce2665a4a6bc1eafa6898f5f4f2cc8b25d96e1358",
            "source": "amazon-inspector",
            "versions": [
                "0.9.1"
            ]
        },
        {
            "id": "IN-MAL-2026-003208",
            "import_time": "2026-05-26T05:50:12.917213925Z",
            "modified_time": "2026-05-19T17:15:00Z",
            "sha256": "b04527dd3d88ec0bd3482999c3c1d989df040ba749bafb99fefad3f0c9820ef6",
            "source": "amazon-inspector",
            "versions": [
                "0.10.0"
            ]
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - actran@amazon.com

Affected packages

npm / @citely/mcp-server

Package

Name: @citely/mcp-server; View open source insights on deps.dev
Purl: pkg:npm/%40citely%2Fmcp-server

Affected ranges

Affected versions

0.*

0.9.1

0.10.0

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": "dist/index.js",
            "sha256": "beccb9c7edfd40f9190988cff379f45cf013cb1b3de10381463a48bb1cb57dc3",
            "tlsh": "79a3f89851fa213207a3a1742d2f9057b6b4d013351deca4bbec82542f9d47b82f7bad"
        }
    ],
    "package_integrity": [
        {
            "filename": "mcp-server-0.9.1.tgz",
            "hashes": {
                "sha1": "c2b6d1029c9e1f065f3f79ad1cd686dc561e621b",
                "sha512_sri": "sha512-03SWfSTbGK5fOjCvxjl0usGrNtYbswwvDghoT7cGgZ4/YBA4sS6CSN9QbT6fVFQLVNkBjD0I7Lu2+zPTPcXsyA=="
            }
        }
    ]
}

source

"https://github.com/ossf/malicious-packages/blob/main/osv/withdrawn/npm/@citely/mcp-server/MAL-2026-4375.json"