diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc85b894d9c..3fe44f20591 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 ## [`master`](https://github.com/elastic/eui/tree/master)
 
-No public interface changes since `23.1.0`.
+- Applies `max-width: 100%` to `EuiPageBody` so inner flex-based items don't overflow their containers  ([#3375](https://github.com/elastic/eui/pull/3375))
 
 ## [`23.1.0`](https://github.com/elastic/eui/tree/v23.1.0)
 
diff --git a/src/components/page/page_body/_page_body.scss b/src/components/page/page_body/_page_body.scss
index 0ce849817b8..990f0fcd1ab 100644
--- a/src/components/page/page_body/_page_body.scss
+++ b/src/components/page/page_body/_page_body.scss
@@ -3,6 +3,8 @@
   flex-direction: column;
   align-items: stretch;
   flex: 1 1 100%;
+  // Make sure that inner flex layouts don't get larger than this container
+  max-width: 100%;
 
   &--restrictWidth-default,
   &--restrictWidth-custom {