diff --git a/.changeset/tame-pumpkins-jump.md b/.changeset/tame-pumpkins-jump.md
new file mode 100644
index 00000000000..e6deab2ef3e
--- /dev/null
+++ b/.changeset/tame-pumpkins-jump.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+Fix(Dialog): set height limit of 35% to DialogHeader
diff --git a/packages/react/src/Dialog/Dialog.module.css b/packages/react/src/Dialog/Dialog.module.css
index 343be7320da..2264abab174 100644
--- a/packages/react/src/Dialog/Dialog.module.css
+++ b/packages/react/src/Dialog/Dialog.module.css
@@ -214,7 +214,9 @@
 
 .Header {
   z-index: 1;
+  max-height: 35vh;
   padding: var(--base-size-8);
+  overflow-y: auto;
   /* stylelint-disable-next-line primer/box-shadow */
   box-shadow: 0 1px 0 var(--borderColor-default);
   flex-shrink: 0;