diff --git a/packages/eui/changelogs/upcoming/9510.md b/packages/eui/changelogs/upcoming/9510.md
new file mode 100644
index 000000000000..587e6eab223d
--- /dev/null
+++ b/packages/eui/changelogs/upcoming/9510.md
@@ -0,0 +1,3 @@
+**Bug fixes**
+
+- Fixed `EuiTreeView` expanded nodes clipping content and causing sibling overlap when children exceed viewport height
diff --git a/packages/eui/src/components/tree_view/tree_view_item.styles.ts b/packages/eui/src/components/tree_view/tree_view_item.styles.ts
index 8c91c83aaa6d..2eae56a96638 100644
--- a/packages/eui/src/components/tree_view/tree_view_item.styles.ts
+++ b/packages/eui/src/components/tree_view/tree_view_item.styles.ts
@@ -31,7 +31,7 @@ export const euiTreeViewItemStyles = (euiThemeContext: UseEuiTheme) => {
         line-height: ${compressedSize};
       `,
       expanded: css`
-        ${logicalCSS('max-height', '100vh')}
+        ${logicalCSS('max-height', 'none')}
       `,
     },