Caveat verdict

yfinance

yfinance-mcp-server

🟢 Trusted

No high-risk patterns surfaced by the deep scan — automated capability review, not behavioral proof.

MCP server providing Yahoo Finance data access tools; network and package capabilities serve fetching public financial data with no credentials or exfiltration.

⚠ Flagged for review — coarse, uncorroborated signal, not a confirmed exploit. Review the config yourself before installing.

Automated static analysis — not a human review. Caveat flags capabilities, not confirmed intent, and can produce false positives. Disagree with this verdict? Use Dispute below.

security

transparency

maintenance

Permission integrity

Makes network requests but does not declare curl/wget in required binaries

network_out

Installs packages at runtime — transitive dependencies are not auditable

package_install

Findings (3)

Pattern match critical

Pipe-to-shell pattern (curl | sh) — supply chain attack vector

SKILL.md · code · curl -LsSf https://astral.sh/uv/install.sh | sh

Pattern match critical

Pipe to sh — executes piped content as shell commands

SKILL.md · code · | sh

Pattern match low

Popular HTTP library — network access

install.sh · prose · downgraded · got

Why the tier is capped

Execution sink present in raw bytes (Hard Floor: class A/B). Final tier capped at Caution — cannot be lifted by any downgrade, example-payload opt-in, or allowlist.

Permissions & capabilities

No declared permissions — minimal attack surface.

network_innetwork_outpackage_install

Is this flag fair?

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