diff --git a/content/browser/digital_credentials/digital_identity_request_impl.cc b/content/browser/digital_credentials/digital_identity_request_impl.cc
index f10b4304c79cf..66f6230fe2a9c 100644
--- a/content/browser/digital_credentials/digital_identity_request_impl.cc
+++ b/content/browser/digital_credentials/digital_identity_request_impl.cc
@@ -648,13 +648,23 @@ void DigitalIdentityRequestImpl::Get(
     return;
   }
 
-  update_interstitial_on_abort_callback_ =
-      provider_->ShowDigitalIdentityInterstitial(
-          *WebContents::FromRenderFrameHost(&render_frame_host()), origin(),
-          *interstitial_type,
-          base::BindOnce(&DigitalIdentityRequestImpl::OnInterstitialDone,
-                         weak_ptr_factory_.GetWeakPtr(),
-                         std::move(request_to_send)));
+  // ShowDigitalIdentityInterstitial() synchronously shows a tab-modal dialog
+  // (ShowWebModal -> BlockWebContentsInteraction -> ExitFullscreen). On some
+  // platforms ExitFullscreenModeForTab() can spin the message loop and destroy
+  // the hosting WebContents (and therefore `this`, a DocumentService). Guard
+  // with a WeakPtr and bail out if that happens, mirroring the close-UI guard
+  // in CompleteRequestWithStatus().
+  base::WeakPtr<DigitalIdentityRequestImpl> weak_this =
+      weak_ptr_factory_.GetWeakPtr();
+  auto abort_callback = provider_->ShowDigitalIdentityInterstitial(
+      *web_contents, origin(), *interstitial_type,
+      base::BindOnce(&DigitalIdentityRequestImpl::OnInterstitialDone,
+                     weak_ptr_factory_.GetWeakPtr(),
+                     std::move(request_to_send)));
+  if (!weak_this) {
+    return;
+  }
+  update_interstitial_on_abort_callback_ = std::move(abort_callback);
 }
 
 void DigitalIdentityRequestImpl::Create(