diff --git a/third_party/blink/renderer/core/css/scroll_state_query_snapshot.cc b/third_party/blink/renderer/core/css/scroll_state_query_snapshot.cc
index bbebca045de4d..10c36dcb48ad1 100644
--- a/third_party/blink/renderer/core/css/scroll_state_query_snapshot.cc
+++ b/third_party/blink/renderer/core/css/scroll_state_query_snapshot.cc
@@ -8,6 +8,8 @@
 #include "third_party/blink/renderer/core/css/style_change_reason.h"
 #include "third_party/blink/renderer/core/dom/document.h"
 #include "third_party/blink/renderer/core/dom/element.h"
+#include "third_party/blink/renderer/core/html/forms/html_select_element.h"
+#include "third_party/blink/renderer/core/html/forms/text_control_element.h"
 #include "third_party/blink/renderer/core/layout/layout_box_model_object.h"
 #include "third_party/blink/renderer/core/layout/layout_view.h"
 #include "third_party/blink/renderer/core/paint/object_paint_properties.h"
@@ -50,7 +52,20 @@ bool ScrollStateQuerySnapshot::UpdateSnapshot() {
     if (layout_object->IsDocumentElement()) {
       layout_object = layout_object->View();
     }
-    if (PaintLayerScrollableArea* scrollable_area =
+    // Don't disclose autofill-preview state through scroll-state(scrollable).
+    // The PaintLayerScrollableArea reflects the previewed value/option even
+    // though Element::scrollTop()/scrollHeight() mask it. crbug.com/1261689.
+    bool mask_for_autofill_preview = false;
+    if (auto* text_control = DynamicTo<TextControlElement>(container_.Get())) {
+      mask_for_autofill_preview = !text_control->SuggestedValue().empty();
+    } else if (auto* select =
+                   DynamicTo<HTMLSelectElement>(container_.Get())) {
+      mask_for_autofill_preview =
+          !select->UsesMenuList() && select->IsPreviewed();
+    }
+    if (mask_for_autofill_preview) {
+      // Behave as if the container is not scrollable while previewing.
+    } else if (PaintLayerScrollableArea* scrollable_area =
             layout_object->GetScrollableArea()) {
       ScrollOffset max_offset = scrollable_area->MaximumScrollOffset();
       ScrollOffset min_offset = scrollable_area->MinimumScrollOffset();