diff --git a/.changeset/hot-socks-cross.md b/.changeset/hot-socks-cross.md
new file mode 100644
index 0000000000..5eca29e058
--- /dev/null
+++ b/.changeset/hot-socks-cross.md
@@ -0,0 +1,7 @@
+---
+'@backstage/ui': patch
+---
+
+Fixed Table with row selection creating phantom scroll height on ancestor elements by establishing a containing block for visually-hidden checkbox inputs.
+
+**Affected components:** Table, TableRoot
diff --git a/packages/ui/src/components/Table/Table.module.css b/packages/ui/src/components/Table/Table.module.css
index 969d27b805..0331b6c350 100644
--- a/packages/ui/src/components/Table/Table.module.css
+++ b/packages/ui/src/components/Table/Table.module.css
@@ -31,6 +31,8 @@
   }
 
   .bui-Table {
+    /* Establishes containing block for react-aria's absolutely positioned hidden checkbox inputs, preventing them from escaping to a distant ancestor and creating phantom scroll height. */
+    position: relative;
     width: 100%;
     caption-side: bottom;
     border-collapse: collapse;