diff --git a/moli-renderer-v8/src/context_bootstrap/exposed_interfaces/metadata.rs b/moli-renderer-v8/src/context_bootstrap/exposed_interfaces/metadata.rs
index a8598c8f2c..397c8223a5 100644
--- a/moli-renderer-v8/src/context_bootstrap/exposed_interfaces/metadata.rs
+++ b/moli-renderer-v8/src/context_bootstrap/exposed_interfaces/metadata.rs
@@ -120,6 +120,10 @@ const SECURE_CONTEXT_ONLY_INTERFACE_NAMES: &[&str] = &[
     "ToolCancelEvent",
     "WebTransportBidirectionalStream",
     "WebTransportDatagramDuplexStream",
+    "MediaKeySession",
+    "MediaKeyStatusMap",
+    "MediaKeySystemAccess",
+    "MediaKeys",
     "MediaDeviceInfo",
     "InputDeviceInfo",
     "DeviceMotionEvent",
diff --git a/moli-renderer-v8/src/context_bootstrap/specs/registry.rs b/moli-renderer-v8/src/context_bootstrap/specs/registry.rs
index e3ff77e954..ffa784c2af 100644
--- a/moli-renderer-v8/src/context_bootstrap/specs/registry.rs
+++ b/moli-renderer-v8/src/context_bootstrap/specs/registry.rs
@@ -1331,6 +1331,22 @@ const CONSTRUCTOR_SPECS_AFTER_STREAMS: &[ConstructorSpec] = &[
         interface: web_api_interfaces::MediaRecorder::DESCRIPTOR,
         kind: ConstructorKind::Shell { length: 1 },
     },
+    ConstructorSpec {
+        interface: web_api_interfaces::MediaKeys::DESCRIPTOR,
+        kind: ConstructorKind::Illegal,
+    },
+    ConstructorSpec {
+        interface: web_api_interfaces::MediaKeySystemAccess::DESCRIPTOR,
+        kind: ConstructorKind::Illegal,
+    },
+    ConstructorSpec {
+        interface: web_api_interfaces::MediaKeyStatusMap::DESCRIPTOR,
+        kind: ConstructorKind::Illegal,
+    },
+    ConstructorSpec {
+        interface: web_api_interfaces::MediaKeySession::DESCRIPTOR,
+        kind: ConstructorKind::Illegal,
+    },
     ConstructorSpec {
         interface: web_api_interfaces::MediaError::DESCRIPTOR,
         kind: ConstructorKind::MediaError,
diff --git a/moli-renderer-v8/src/script_vm/tests/eme_owner_interface_exposure_interfaces.rs b/moli-renderer-v8/src/script_vm/tests/eme_owner_interface_exposure_interfaces.rs
new file mode 100644
index 0000000000..02e033b289
--- /dev/null
+++ b/moli-renderer-v8/src/script_vm/tests/eme_owner_interface_exposure_interfaces.rs
@@ -0,0 +1,43 @@
+use super::*;
+
+#[test]
+fn eme_owner_interface_exposure_interfaces_have_realm_local_constructors_and_exposure() {
+    for url in [
+        "https://interface-exposure.test/",
+        "http://interface-exposure.test/",
+    ] {
+        let mut vm = new_storage_test_vm(url);
+        assert_eq!(vm.eval(r#"
+(() => {
+  const assert = (ok, message) => { if (!ok) throw Error(message); };
+  const names = ["MediaKeySession", "MediaKeyStatusMap", "MediaKeySystemAccess", "MediaKeys"];
+  const parents = {"MediaKeySession": "EventTarget", "MediaKeyStatusMap": null, "MediaKeySystemAccess": null, "MediaKeys": null};
+  if (!document.documentElement) document.appendChild(document.createElement('html'));
+  if (!document.body) document.documentElement.appendChild(document.createElement('body'));
+  const child = document.createElement('iframe');
+  document.body.appendChild(child);
+  const other = child.contentWindow;
+  for (const realm of [window, other]) {
+    for (const name of names) {
+      if (!isSecureContext) {
+        assert(!(name in realm), name + ' unavailable outside secure contexts');
+        continue;
+      }
+      const C = realm[name];
+      assert(typeof C === 'function' && C.name === name && C.length === 0, name + ' constructor');
+      assert(C.prototype.constructor === C, name + ' prototype identity');
+      assert(Object.getPrototypeOf(C.prototype) === (parents[name] ? realm[parents[name]].prototype : realm.Object.prototype), name + ' prototype inheritance');
+      assert(realm[name] === C, name + ' stable lazy materialization');
+      for (const invoke of [() => C(), () => new C(), () => Reflect.construct(C, [], function Subclass() {})]) {
+        let error;
+        try { invoke(); } catch (caught) { error = caught; }
+        assert(error instanceof realm.TypeError, name + ' rejects construction in callee realm');
+      }
+      assert(C !== (realm === window ? other[name] : window[name]), name + ' distinct realm constructors');
+    }
+  }
+  return 'passed';
+})()
+"#).unwrap(), "passed", "{url}");
+    }
+}
diff --git a/moli-renderer-v8/src/script_vm/tests/mod.rs b/moli-renderer-v8/src/script_vm/tests/mod.rs
index 2c69d62fb3..9bf83c18c6 100644
--- a/moli-renderer-v8/src/script_vm/tests/mod.rs
+++ b/moli-renderer-v8/src/script_vm/tests/mod.rs
@@ -2151,6 +2151,7 @@ mod dom_elements;
 mod dom_exception_proxy_identity;
 mod dom_xhr;
 mod element_click;
+mod eme_owner_interface_exposure_interfaces;
 mod encoded_video_chunk_shell;
 mod event_receivers;
 mod geometry_point_conversion_order;
diff --git a/moli-renderer-v8/src/web_api_interfaces.rs b/moli-renderer-v8/src/web_api_interfaces.rs
index dfcccc7298..f880f6fd34 100644
--- a/moli-renderer-v8/src/web_api_interfaces.rs
+++ b/moli-renderer-v8/src/web_api_interfaces.rs
@@ -306,6 +306,10 @@ interfaces! {
     CanvasCaptureMediaStreamTrack: MediaStreamTrack;
     MediaDevices: EventTarget;
     MediaError;
+    MediaKeySession: EventTarget;
+    MediaKeyStatusMap;
+    MediaKeySystemAccess;
+    MediaKeys;
     MediaList;
     MediaQueryList: EventTarget;
     MediaQueryListEvent: Event;