io.github.jcooley8/pincushion

What we checked

Six static checks, weighted by risk. Every result reflects only what could be observed in the published package and repository — never intent.

• Injection surface

  unscannable25% of grade

  Tool descriptions/manifest scanned for instruction-injection patterns (imperatives at the model, hidden text, 'ignore previous', data-exfil URLs).

  No tool descriptions, server instructions, prompts, or resources were fetched; nothing to scan for injection.

• Supply chain

  warn25% of grade

  Package provenance: namespace verification, repo linkage, maintainer count, account age, postinstall scripts, typosquat distance.

  dependency "@sentry/node" is edit-distance 2 from popular package "@babel/core" (typosquat candidate)

• Credential hygiene

  pass15% of grade

  How the server takes secrets (env vs plaintext config vs hardcoded); secrets appearing in tool schemas.

  Reads secrets from the environment (e.g. lib/git.js) — the recommended intake shape. PASS = no static red flag; static analysis cannot prove the code honors env-based secret handling at runtime.

• Permission scope

  fail15% of grade

  Declared tools vs. breadth (filesystem, network, exec); flags shell-exec and unbounded filesystem access.

  HIGH: downloads and pipes straight to a shell (mobile-wall.mjs: pipes a download into a shell). references credential paths: server.js: references a credential path (/mcp.json) discloses shell/exec capability: scripts/build-mcpb.mjs: imports child_process and calls exec/spawn discloses shell/exec capability: login.mjs: imports child_process and calls exec/spawn discloses shell/exec capability: mobile-wall.mjs: imports child_process and calls exec/spawn Capability DISCLOSURE, not a verdict: static analysis sees the primitive is present and reachable, not whether its use is attacker-controlled.

• Version behavior

  fail10% of grade

  Diff of tool definitions between versions; new permissions or changed descriptions in a patch release (the postmark-mcp class).

  vs prior 1.11.11 (patch bump): new capability primitive(s) in source: child_process, http-client; new hardcoded outbound host/BCC destination(s): ..., 127.0.0.1, 5f5aa1bd3aef5b79dcb91ebbc290d6b3, adaptivecards.io, api.vercel.com, app.example.com, dpsqzszdviltqvethxbr.supabase.co, example.com, get.maestro.mobile.dev, github.com, localhost., pincushion.io, sync.example.com, us.i.posthog.com, www.pincushion.io, xxx.supabase.co.

• Transport config

  warn10% of grade

  Remote servers: TLS and auth mode (none/token/OAuth). Local servers: whether the manifest indicates it phones home.

  sends telemetry to third-party SDK (PostHog) — disclosure, verify opt-in; manifest/source references analytics behavior — disclosure