diff --git a/backend/src/baserow/core/registries.py b/backend/src/baserow/core/registries.py
index 46bc6e1fa4..e6428a28d8 100755
--- a/backend/src/baserow/core/registries.py
+++ b/backend/src/baserow/core/registries.py
@@ -1024,11 +1024,29 @@ def get_objects_in_scopes(self, scopes: List[Any]) -> Dict[Any, Any]:
                 parent_scope_types.add(object_scope_type)
 
         if parent_scopes:
-            query_result = list(
-                self.get_enhanced_queryset().filter(
-                    self.get_filter_for_scopes(parent_scopes)
+            scopes_by_type = defaultdict(list)
+            for scope in parent_scopes:
+                scopes_by_type[object_scope_type_registry.get_by_model(scope)].append(
+                    scope
                 )
+
+            enhanced_queryset = self.get_enhanced_queryset()
+            ordering = (
+                enhanced_queryset.query.order_by
+                or enhanced_queryset.model._meta.ordering
+            )
+
+            branches = [
+                enhanced_queryset.filter(
+                    self.get_filter_for_scope_type(scope_type, typed_scopes)
+                ).order_by()
+                for scope_type, typed_scopes in scopes_by_type.items()
+            ]
+            combined = (
+                branches[0] if len(branches) == 1 else branches[0].union(*branches[1:])
             )
+            combined = combined.order_by(*ordering)
+            query_result = list(combined)
 
             # We have all the objects in the queryset, but now we want to sort them
             # into buckets per original scope they are a child of.
diff --git a/changelog/entries/unreleased/bug/improve_permissions_endpoint_query_performance.json b/changelog/entries/unreleased/bug/improve_permissions_endpoint_query_performance.json
new file mode 100644
index 0000000000..d9f88093c6
--- /dev/null
+++ b/changelog/entries/unreleased/bug/improve_permissions_endpoint_query_performance.json
@@ -0,0 +1,9 @@
+{
+  "type": "bug",
+  "message": "Improve permissions endpoint query performance by using union instead of OR.",
+  "issue_origin": "github",
+  "issue_number": null,
+  "domain": "database",
+  "bullet_points": [],
+  "created_at": "2026-06-03"
+}
diff --git a/web-frontend/modules/core/components/crudTable/CrudTable.vue b/web-frontend/modules/core/components/crudTable/CrudTable.vue
index ccd0fd0a18..6dc2ee8534 100644
--- a/web-frontend/modules/core/components/crudTable/CrudTable.vue
+++ b/web-frontend/modules/core/components/crudTable/CrudTable.vue
@@ -77,36 +77,47 @@
             </tr>
           </thead>
           <tbody>
-            <tr
-              v-for="row in rows"
-              :key="'row-' + row.id"
-              class="data-table__table-row"
+            <slot
+              name="rows"
+              :rows="rows"
+              :columns="columns"
+              :update-row="updateRow"
+              :delete-row="deleteRow"
+              :refresh="refresh"
             >
-              <td
-                v-for="col in columns"
-                :key="'col-' + col.key"
-                class="data-table__table-cell"
-                :class="{
-                  'data-table__table-cell--sticky-left': col.stickyLeft,
-                  'data-table__table-cell--sticky-right': col.stickyRight,
-                  [`data-table__table-cell--${col.key}`]: true,
-                }"
-                @contextmenu="$emit('row-context', { col, row, event: $event })"
+              <tr
+                v-for="row in rows"
+                :key="'row-' + row.id"
+                class="data-table__table-row"
               >
-                <div class="data-table__table-cell-content">
-                  <component
-                    :is="col.cellComponent"
-                    :row="row"
-                    :column="col"
-                    v-on="$attrs"
-                    @row-context="(payload) => $emit('row-context', payload)"
-                    @row-update="updateRow"
-                    @row-delete="deleteRow"
-                    @refresh="refresh"
-                  />
-                </div>
-              </td>
-            </tr>
+                <td
+                  v-for="col in columns"
+                  :key="'col-' + col.key"
+                  class="data-table__table-cell"
+                  :class="{
+                    'data-table__table-cell--sticky-left': col.stickyLeft,
+                    'data-table__table-cell--sticky-right': col.stickyRight,
+                    [`data-table__table-cell--${col.key}`]: true,
+                  }"
+                  @contextmenu="
+                    $emit('row-context', { col, row, event: $event })
+                  "
+                >
+                  <div class="data-table__table-cell-content">
+                    <component
+                      :is="col.cellComponent"
+                      :row="row"
+                      :column="col"
+                      v-on="$attrs"
+                      @row-context="(payload) => $emit('row-context', payload)"
+                      @row-update="updateRow"
+                      @row-delete="deleteRow"
+                      @refresh="refresh"
+                    />
+                  </div>
+                </td>
+              </tr>
+            </slot>
           </tbody>
         </table>
       </div>
@@ -145,6 +156,7 @@ import isObject from 'lodash/isObject'
  *          Two slot props are provided `updateRow` and `deleteRow` which are functions
  *          called when your menu has changed the row state which trigger the CrudTable
  *          to rerender the rows with the new data.
+ *  #rows: Can optionally replace the rows in the table.
  */
 export default {
   name: 'CrudTable',