- TokenMiddleware/ResponseMiddleware/audit logger use scope['path']
instead of request.url.path for whitelist checks: a crafted Host
header (e.g. x/api/v1/mcp) was concatenated into Starlette's URL
and made protected routes match the /mcp* whitelist entry
- validateEmbedded rejects admin accounts and non-type-4 apps, so a
self-signed token with account=admin can no longer impersonate the
administrator
- Add HostValidationMiddleware rejecting malformed Host headers at the
outermost layer (defense in depth)
- Add regression tests for host validation, whitelist matching and
source-level guards
Co-Authored-By: Claude <[email protected]>
