diff --git a/web/src/pages/chat/markdown-content/index.tsx b/web/src/pages/chat/markdown-content/index.tsx
index b3c1988f9..a62de227f 100644
--- a/web/src/pages/chat/markdown-content/index.tsx
+++ b/web/src/pages/chat/markdown-content/index.tsx
@@ -50,7 +50,7 @@ const MarkdownContent = ({
   const { setDocumentIds, data: fileThumbnails } =
     useFetchDocumentThumbnailsByIds();
   const contentWithCursor = useMemo(() => {
-    let text = content;
+    let text = DOMPurify.sanitize(content);
     if (text === '') {
       text = t('chat.searching');
     }