diff --git a/packages/react-aria/src/overlays/ariaHideOutside.ts b/packages/react-aria/src/overlays/ariaHideOutside.ts
index 66cc828ad2c..543e51127be 100644
--- a/packages/react-aria/src/overlays/ariaHideOutside.ts
+++ b/packages/react-aria/src/overlays/ariaHideOutside.ts
@@ -50,7 +50,7 @@ let observerStack: Array<ObserverWrapper> = [];
 export function ariaHideOutside(targets: Element[], options?: AriaHideOutsideOptions | Element) {
   let windowObj = getOwnerWindow(targets?.[0]);
   let opts = options instanceof windowObj.Element ? {root: options} : options;
-  let root = opts?.root ?? document.body;
+  let root = opts?.root ?? windowObj.document.body;
   let shouldUseInert = opts?.shouldUseInert && supportsInert;
   let visibleNodes = new Set<Element>(targets);
   let hiddenNodes = new Set<Element>();
diff --git a/packages/react-aria/test/overlays/ariaHideOutside.test.js b/packages/react-aria/test/overlays/ariaHideOutside.test.js
index 737d8b8d4d9..abac6d02d90 100644
--- a/packages/react-aria/test/overlays/ariaHideOutside.test.js
+++ b/packages/react-aria/test/overlays/ariaHideOutside.test.js
@@ -49,6 +49,30 @@ describe('ariaHideOutside', function () {
     expect(() => getByRole('button')).not.toThrow();
   });
 
+  it('should use the target document as the default root', function () {
+    let iframe = document.createElement('iframe');
+    let iframeSibling = document.createElement('div');
+    document.body.appendChild(iframe);
+    document.body.appendChild(iframeSibling);
+    let iframeDocument = iframe.contentWindow.document;
+    iframeDocument.body.innerHTML = '<div id="outside"></div><div id="target"></div>';
+    let target = iframeDocument.getElementById('target');
+    let outside = iframeDocument.getElementById('outside');
+
+    let revert = ariaHideOutside([target]);
+
+    expect(outside).toHaveAttribute('aria-hidden', 'true');
+    expect(target).not.toHaveAttribute('aria-hidden');
+    expect(iframe).not.toHaveAttribute('aria-hidden');
+    expect(iframeSibling).not.toHaveAttribute('aria-hidden');
+    expect(document.body).not.toHaveAttribute('aria-hidden');
+
+    revert();
+    expect(outside).not.toHaveAttribute('aria-hidden');
+    iframe.remove();
+    iframeSibling.remove();
+  });
+
   it('should hide everything except multiple elements', function () {
     let {getByRole, getAllByRole, queryByRole, queryAllByRole} = render(
       <>