Summary
iris-eval/mcp-server v2026-03-20 was classified as CRITICAL RISK with a risk score of 255. Sigil detected 25 findings across 285 files, covering phases including provenance, network exfiltration, code patterns, install hooks. Review the findings below before installing this package.
Package description: The agent eval standard for MCP — score output quality, catch safety failures, enforce cost budgets
v2026-03-20
21 March 2026, 00:32 UTC
by Sigil Bot
Risk Score
255
Findings
25
Files Scanned
285
Provenance
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-npm-postinstall
CRITICALnpm lifecycle script — runs automatically on install
repo/package.json:29
"demo": "tsx scripts/demo.ts",
"postinstall": "echo \"\\n ✅ Iris installed — the agent eval standard for MCP\\n 📖 Docs: https://iris-eval.com\\n 🎯 Try the playground: https://iris-eval.com/playground\\n ⭐ Star us: https://github.com/iris-eval/mcp-server\\n\""
},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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