diff --git a/hermes_cli/dashboard_auth/middleware.py b/hermes_cli/dashboard_auth/middleware.py
index 2c5f5b4f7b95..2e2eab399d8d 100644
--- a/hermes_cli/dashboard_auth/middleware.py
+++ b/hermes_cli/dashboard_auth/middleware.py
@@ -182,9 +182,16 @@ def _auto_sso_response(request: Request) -> Response | None:
         # Zero → nothing to redirect to. Two+ → user must choose at /login.
         return None
 
+    provider = providers[0]
+
+    # Password-only providers (e.g. BasicAuthProvider) don't support the
+    # OAuth redirect dance that /auth/login initiates.  Fall through to
+    # the normal /login interstitial which renders a password form.
+    if getattr(provider, "supports_password", False):
+        return None
+
     from hermes_cli.dashboard_auth.prefix import prefix_from_request
 
-    provider = providers[0]
     prefix = prefix_from_request(request)
     next_param = _safe_next_target(request)
     from urllib.parse import quote