# Phoenix — CWE-407 Diamond Traversal Scan: CLEAN

Scanned: 2026-03-30

## Files examined

- `lib/phoenix/router.ex` — plug pipeline compilation uses Elixir macros; no recursive module hierarchy traversal
- `lib/phoenix/endpoint.ex` — module configuration, no class hierarchy traversal
- `lib/phoenix/channel.ex` — no recursive module traversal

## Result

No diamond recursion defects found. Elixir's module system is flat — modules do not have a
mutable inheritance hierarchy that can form diamonds. `use Phoenix.Router` and related macros
expand at compile time into a flat list of plugs. No recursive `ancestors`/`__bases__` pattern
exists in Elixir/Phoenix.