Is @modelcontextprotocol/server-pdf safe to install?

@modelcontextprotocol/server-pdf was flagged as CRITICAL RISK (risk score 1641) with 104 findings detected across 9 files. Review the findings before installing.

What security issues were found in @modelcontextprotocol/server-pdf?

Sigil detected 104 findings in @modelcontextprotocol/server-pdf, including patterns related to install_hooks, code_patterns, obfuscation, network_exfil. See the full scan report for details.

Scans/npm/@modelcontextprotocol/server-pdf

@modelcontextprotocol/server-pdf

npm

Summary

@modelcontextprotocol/server-pdf v1.3.1 was classified as CRITICAL RISK with a risk score of 1641. Sigil detected 104 findings across 9 files, covering phases including install hooks, code patterns, obfuscation, network exfiltration. Review the findings below before installing this package.

CRITICAL RISK(1641)

v1.3.1

23 March 2026, 20:35 UTC

by Sigil Bot

Risk Score

1641

Findings

104

Files Scanned

Provenance

Registry

https://www.npmjs.com/package/@modelcontextprotocol/server-pdf/v/1.3.1

Scanned From

https://registry.npmjs.org/@modelcontextprotocol/server-pdf/-/server-pdf-1.3.1.tgz

Findings by Phase

•

Phase Ordering

Phases are ordered by criticality, with the most dangerous at the top. Click any phase header to expand or collapse its findings. Critical phases are expanded by default.

install-pip-setup-exec

CRITICAL

setup.py executes code at install time

package/dist/index.js:161

var require_common = __commonJS((exports, module) => {
  function setup(env) {
    createDebug.debug = createDebug;

Why was this flagged?

This setup.py calls subprocess, os.system, exec, or eval during package installation. Legitimate packages rarely need to execute arbitrary commands at install time. This pattern is commonly used by malicious packages to download and run payloads, exfiltrate environment variables, or establish persistence. Rated CRITICAL because it runs with the installer's full permissions.

install-pip-setup-exec

CRITICAL

setup.py executes code at install time

package/dist/mcp-app.html:84

container holding the app. Specify either width or maxWidth, and either height or maxHeight.`),locale:j().optional().describe("User's language and region preference in BCP 47 format."),timeZone:j().optional().describe("User's timezone in IANA format."),userAgent:j().optional().describe("Host application identifier."),platform:cg([v("web"),v("desktop"),v("mobile")]).optional().describe("Platform type for responsive design decisions."),deviceCapabilities:x({touch:$g().optional().describe("Whether

Why was this flagged?

Badge

Markdown

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HTML

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