fix(auth): match templated info routes by pattern

is_info_route compared the request path against info_routes with a bare `in`, so an entry
carrying a path parameter could never match: the incoming route holds a resolved id, not the
`{key_id}` template. /key/{key_id}/budgets was therefore refused for the view-only, team and
customer roles that /key/info serves, and its info_routes entry matched nothing at all.

Route it through check_route_access, the way is_management_route already does. It is the only
templated entry in the list today, so no other route changes reachability.

litellm/proxy/auth/route_checks.py

@@ -440,8 +440,11 @@ class RouteChecks:
     def is_info_route(route: str) -> bool:
         """
         Check if route is an info route
+
+        Pattern-aware, like ``is_management_route``, so an info route carrying a path parameter is as
+        reachable as one without: the incoming route holds a resolved id, never the ``{...}`` template.
         """
-        return route in LiteLLMRoutes.info_routes.value
+        return RouteChecks.check_route_access(route=route, allowed_routes=LiteLLMRoutes.info_routes.value)
 
     @staticmethod
     def _is_azure_openai_route(route: str) -> bool:

tests/test_litellm/proxy/auth/test_info_routes.py

@@ -149,3 +149,48 @@ def test_v2_user_info_route_access():
         valid_token=valid_token,
         request_data={},
     )
+
+
+@pytest.mark.parametrize(
+    "role",
+    [
+        LitellmUserRoles.INTERNAL_USER,
+        LitellmUserRoles.INTERNAL_USER_VIEW_ONLY,
+        LitellmUserRoles.TEAM,
+        LitellmUserRoles.CUSTOMER,
+        None,
+    ],
+)
+def test_templated_info_route_is_as_reachable_as_a_plain_one(role):
+    """
+    A resolved path parameter must not make an info route less reachable than one without.
+
+    `is_info_route` compared the request path against the route list by exact string, so
+    `/key/{key_id}/budgets` never matched a real request and callers who could read /key/info
+    were refused on the equivalent budgets route.
+    """
+    user_obj = LiteLLM_UserTable(
+        user_id="test_user",
+        user_email="test@example.com",
+        user_role=role.value if role is not None else None,
+        max_budget=None,
+        spend=0.0,
+        models=[],
+    )
+
+    for route in ("/key/info", "/key/some-resolved-key-hash/budgets", "/key/budgets"):
+        RouteChecks.non_proxy_admin_allowed_routes_check(
+            user_obj=user_obj,
+            _user_role=role,
+            route=route,
+            request=MagicMock(spec=Request),
+            valid_token=UserAPIKeyAuth(api_key="sk-test"),
+            request_data={},
+        )
+
+
+def test_templated_route_matching_does_not_widen_unrelated_key_routes():
+    """Pattern matching must stay scoped to the entries in the list, not every /key/<x>/<y> path."""
+    assert RouteChecks.is_info_route("/key/some-hash/regenerate") is False
+    assert RouteChecks.is_info_route("/key/some-hash/delete") is False
+    assert RouteChecks.is_info_route("/key/some-hash/budgets") is True