diff --git a/Source/WebCore/accessibility/AccessibilityObject.cpp b/Source/WebCore/accessibility/AccessibilityObject.cpp

index f10a1519..523dfd46 100644

--- a/Source/WebCore/accessibility/AccessibilityObject.cpp

+++ b/Source/WebCore/accessibility/AccessibilityObject.cpp

@@ -70,6 +70,7 @@

 #include "RenderWidget.h"

 #include "RenderedPosition.h"

 #include "RuntimeEnabledFeatures.h"

+#include "ScriptDisallowedScope.h"

 #include "Settings.h"

 #include "TextCheckerClient.h"

 #include "TextCheckingHelper.h"

@@ -1783,7 +1784,11 @@ void AccessibilityObject::updateBackingStore()

     // Updating the layout may delete this object.

     RefPtr<AccessibilityObject> protectedThis(this);

     if (auto* document = this->document()) {

-        if (!document->view()->layoutContext().isInRenderTreeLayout() && !document->inRenderTreeUpdate() && !document->inStyleRecalc())

+        if (!document->view()->layoutContext().isInRenderTreeLayout()

+            && !document->inRenderTreeUpdate()

+            && !document->inStyleRecalc()

+            && ScriptDisallowedScope::InMainThread::isScriptAllowed())

+

             document->updateLayoutIgnorePendingStylesheets();

     }