diff --git a/crates/engine/src/js.rs b/crates/engine/src/js.rs
index 82ee90c5d..73be05660 100644
--- a/crates/engine/src/js.rs
+++ b/crates/engine/src/js.rs
@@ -30,10 +30,13 @@ impl JsOutput {
         self.alerts.extend(o.alerts.iter().cloned());
         self.console.extend(o.console.iter().cloned());
         // A field's own scripts (keystroke, format, validate, calculate) run unasked: only a
-        // button's may show or hide a side panel.
+        // button's may show or hide a side panel, or open Save As.
         for r in &o.requests {
             match r {
                 Request::ShowPanel(_) => self.console.push("A field script asked to show a side panel; only a button may show a side panel".into()),
+                Request::SaveAs => {
+                    self.console.push("A field script asked to save the document as a new file; only a button may open Save As".into())
+                }
                 r => self.requests.push(r.clone()),
             }
         }
diff --git a/crates/engine/src/tests.rs b/crates/engine/src/tests.rs
index 72854e37a..4c19b8011 100644
--- a/crates/engine/src/tests.rs
+++ b/crates/engine/src/tests.rs
@@ -6133,3 +6133,26 @@ fn an_xfa_button_may_show_a_side_panel_and_other_events_may_not() {
     assert!(out.requests.is_empty(), "only a click shows a panel: {out:?}");
     assert!(out.console.iter().any(|c| c.contains("show a side panel")), "{:?}", out.console);
 }
+
+#[test]
+fn a_fields_own_script_may_not_save_as_or_show_a_panel() {
+    let mut s = Session::new().with_clock(|| 1_700_000_000);
+    let id = s.open("order.pdf", None, Arc::new(scripted_form()), None).unwrap();
+    s.apply(
+        id,
+        Edit::SetFieldScript {
+            name: "qty".into(),
+            event: "validate".into(),
+            script: Some("app.execMenuItem('SaveAs'); app.execMenuItem('ShowHideFileAttachment');".into()),
+        },
+    )
+    .unwrap();
+    s.take_js_output(id);
+    s.apply(id, Edit::SetFieldValue { name: "qty".into(), value: FieldValue::Text("4".into()) }).unwrap();
+    let out = s.take_js_output(id);
+    assert!(out.requests.is_empty(), "a validate script runs unasked: {out:?}");
+    assert_eq!(out.console.iter().filter(|c| c.contains("only a button may")).count(), 2, "{:?}", out.console);
+    // A button's script may.
+    let o = s.run_javascript(id, "app.execMenuItem('SaveAs');", Some("go")).unwrap();
+    assert_eq!(o.requests, [js::Request::SaveAs]);
+}