Summary
ExpertVagabond/solmail-mcp v2026-03-20 was classified as CRITICAL RISK with a risk score of 94. Sigil detected 12 findings across 41 files, covering phases including provenance, install hooks, network exfiltration. Review the findings below before installing this package.
Package description: MCP server for sending physical mail with Solana cryptocurrency. Colosseum Agent Hackathon submission.
v2026-03-20
21 March 2026, 00:33 UTC
by Sigil Bot
Risk Score
94
Findings
12
Files Scanned
41
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-makefile-curl
HIGHMakefile/script pipes remote content to shell
repo/HTTP_DEPLOYMENT.md:120
# Install Fly CLI
curl -L https://fly.io/install.sh | sh
Why 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.
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