diff --git a/changelog/12357.txt b/changelog/12357.txt
new file mode 100644
index 0000000000..30de5af1e6
--- /dev/null
+++ b/changelog/12357.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+ui: Fixed text overflow in flash messages
+```
\ No newline at end of file
diff --git a/ui/app/styles/components/global-flash.scss b/ui/app/styles/components/global-flash.scss
index 8450efd6c2..c0c4b4dba1 100644
--- a/ui/app/styles/components/global-flash.scss
+++ b/ui/app/styles/components/global-flash.scss
@@ -9,5 +9,8 @@
 
   .message {
     box-shadow: $box-shadow-high;
+    .message-body {
+      word-break: break-all;
+    }
   }
 }