Summary
Didiye/mcp-dadosbr v2026-03-22 was classified as CRITICAL RISK with a risk score of 155. Sigil detected 15 findings across 104 files, covering phases including provenance, network exfiltration, code patterns, install hooks. Review the findings below before installing this package.
Package description: 🤖 Access Brazilian business data with ease using the MCP server for CNPJ and CEP lookup, enhancing your AI assistants' capabilities.
v2026-03-22
22 March 2026, 23:55 UTC
by Sigil Bot
Risk Score
155
Findings
15
Files Scanned
104
Provenance
Repository
https://github.com/Didiye/mcp-dadosbrScanned From
https://github.com/Didiye/mcp-dadosbr.gitFindings 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-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/docs/pt-br/desenvolvimento/configuracao-ambiente.md:35
# Instalar via nvm (recomendado)
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash
nvm install 20Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
install-npm-postinstall
CRITICALnpm lifecycle script — runs automatically on install
repo/package.json:28
"prepublishOnly": "npm run build",
"postinstall": "echo 'MCP DadosBR installed! Run with: npx @aredes.me/mcp-dadosbr or mcp-dadosbr'",
"mcp:start": "MCP_TRANSPORT=http MCP_HTTP_PORT=3000 mcp-dadosbr",Why was this flagged?
npm lifecycle scripts like postinstall run automatically during package installation with no user interaction required. This is the #1 attack vector for malicious npm packages — attackers embed data theft or backdoor installation in these hooks. Rated CRITICAL because code executes before the developer can review it.
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