diff --git a/moli-benchmark/wpt-cross-current/failed-cases.txt b/moli-benchmark/wpt-cross-current/failed-cases.txt
index 64fbf587a6..5c7e4bae2f 100644
--- a/moli-benchmark/wpt-cross-current/failed-cases.txt
+++ b/moli-benchmark/wpt-cross-current/failed-cases.txt
@@ -3702,7 +3702,6 @@ trusted-types/block-string-assignment-to-HTMLIFrameElement-srcdoc.html
 trusted-types/block-string-assignment-to-attribute-via-attribute-node.html
 trusted-types/eval-function-constructor-untrusted-arguments-and-applying-default-policy.html
 trusted-types/inheriting-csp-for-local-schemes.html
-trusted-types/legacy-trusted-script-urls.html
 trusted-types/modify-attributes-in-callback.html
 trusted-types/require-trusted-types-for-TypeError-belongs-to-the-global-object-realm.html
 trusted-types/script-enforcement-006.html
diff --git a/moli-benchmark/wpt-cross-current/passed-cases.txt b/moli-benchmark/wpt-cross-current/passed-cases.txt
index 021836c28e..db0b58cfc7 100644
--- a/moli-benchmark/wpt-cross-current/passed-cases.txt
+++ b/moli-benchmark/wpt-cross-current/passed-cases.txt
@@ -7851,6 +7851,7 @@ trusted-types/eval-no-csp-no-tt.html
 trusted-types/eval-with-non-trusted-script-object.html
 trusted-types/eval-with-permissive-csp.html
 trusted-types/get-trusted-types-compliant-attribute-value.html
+trusted-types/legacy-trusted-script-urls.html
 trusted-types/legacy-trusted-scripts.html
 trusted-types/navigate-to-javascript-url-001.html
 trusted-types/navigate-to-javascript-url-002.html
diff --git a/moli-renderer-v8/src/context_bootstrap/trusted_types.rs b/moli-renderer-v8/src/context_bootstrap/trusted_types.rs
index 3a9e30d355..615a2eb323 100644
--- a/moli-renderer-v8/src/context_bootstrap/trusted_types.rs
+++ b/moli-renderer-v8/src/context_bootstrap/trusted_types.rs
@@ -95,6 +95,13 @@ struct TrustedTypePolicyFactoryInterfaceDeclaration {
         enumerable
     )]
     get_attribute_type: (),
+    #[webapi(
+        method = "getPropertyType",
+        callback = trusted_types_get_property_type_callback,
+        length = 2,
+        enumerable
+    )]
+    get_property_type: (),
     #[webapi(
         accessor_property = "defaultPolicy",
         getter = trusted_types_default_policy_getter_callback,
@@ -127,6 +134,17 @@ struct TrustedTypesGetAttributeTypeArgs {
     attribute_namespace: Option<String>,
 }
 
+#[derive(webidl::WebIdlArgs)]
+#[webidl(prefix = "TrustedTypePolicyFactory.getPropertyType")]
+struct TrustedTypesGetPropertyTypeArgs {
+    #[webidl(required)]
+    tag_name: String,
+    #[webidl(required)]
+    property: String,
+    #[webidl(nullable)]
+    element_namespace: Option<String>,
+}
+
 #[derive(WebApiObject)]
 #[webapi(interface = "Object")]
 struct TrustedTypeObjectDeclaration<'scope> {
@@ -1152,6 +1170,36 @@ fn trusted_types_get_attribute_type_callback<'s>(
     rv.set(type_name.into());
 }
 
+fn trusted_types_get_property_type_callback<'s>(
+    scope: &mut v8::PinScope<'s, '_>,
+    args: v8::FunctionCallbackArguments<'s>,
+    mut rv: v8::ReturnValue<'_, v8::Value>,
+) {
+    if !trusted_types_factory_receiver_is_valid(scope, args.this()) {
+        return;
+    }
+    let Some(parsed) = webidl::parse_args::<TrustedTypesGetPropertyTypeArgs>(scope, &args) else {
+        return;
+    };
+    let element_namespace = parsed
+        .element_namespace
+        .filter(|namespace| !namespace.is_empty())
+        .unwrap_or_else(|| crate::native_bridge::document::XHTML_NS.to_owned());
+    let tag_name = parsed.tag_name.to_ascii_lowercase();
+    let Some(type_name) = crate::native_bridge::element::trusted_property_type_name_for_names(
+        &element_namespace,
+        &tag_name,
+        &parsed.property,
+    ) else {
+        rv.set_null();
+        return;
+    };
+    let Some(type_name) = v8_string(scope, type_name) else {
+        return;
+    };
+    rv.set(type_name.into());
+}
+
 #[derive(Clone, Copy)]
 enum FunctionConstructorKind {
     Function,
diff --git a/moli-renderer-v8/src/context_bootstrap/trusted_types/realm_state.rs b/moli-renderer-v8/src/context_bootstrap/trusted_types/realm_state.rs
index 176e25503d..f134d05eec 100644
--- a/moli-renderer-v8/src/context_bootstrap/trusted_types/realm_state.rs
+++ b/moli-renderer-v8/src/context_bootstrap/trusted_types/realm_state.rs
@@ -83,6 +83,7 @@ pub(super) fn install_lazy_trusted_types_runtime_state<'s>(
         empty_html: (),
         empty_script: (),
         get_attribute_type: (),
+        get_property_type: (),
         default_policy: (),
     }
     .bind(scope, global)
diff --git a/moli-renderer-v8/src/native_bridge/element.rs b/moli-renderer-v8/src/native_bridge/element.rs
index 532228d0c2..d79b317b73 100644
--- a/moli-renderer-v8/src/native_bridge/element.rs
+++ b/moli-renderer-v8/src/native_bridge/element.rs
@@ -62,6 +62,7 @@ use trusted_types::{
 };
 pub(crate) use trusted_types::{
     set_svg_animated_string_base_value, trusted_attribute_type_name_for_names,
+    trusted_property_type_name_for_names,
 };
 
 pub(crate) use forms::{
diff --git a/moli-renderer-v8/src/native_bridge/element/trusted_types.rs b/moli-renderer-v8/src/native_bridge/element/trusted_types.rs
index 882e406c47..9e5eae2ce6 100644
--- a/moli-renderer-v8/src/native_bridge/element/trusted_types.rs
+++ b/moli-renderer-v8/src/native_bridge/element/trusted_types.rs
@@ -81,15 +81,6 @@ fn trusted_attribute_sink_for_names(
         ("http://www.w3.org/1999/xhtml", "script", None, "src") => {
             Some(TrustedAttributeSink::ScriptUrl("HTMLScriptElement src"))
         }
-        ("http://www.w3.org/1999/xhtml", "embed", None, "src") => {
-            Some(TrustedAttributeSink::ScriptUrl("HTMLEmbedElement src"))
-        }
-        ("http://www.w3.org/1999/xhtml", "object", None, "data") => {
-            Some(TrustedAttributeSink::ScriptUrl("HTMLObjectElement data"))
-        }
-        ("http://www.w3.org/1999/xhtml", "object", None, "codebase") => Some(
-            TrustedAttributeSink::ScriptUrl("HTMLObjectElement codebase"),
-        ),
         (
             "http://www.w3.org/2000/svg",
             "script",
@@ -115,6 +106,24 @@ pub(crate) fn trusted_attribute_type_name_for_names(
     .map(|sink| sink.type_name())
 }
 
+pub(crate) fn trusted_property_type_name_for_names(
+    element_namespace: &str,
+    element_local_name: &str,
+    property_name: &str,
+) -> Option<&'static str> {
+    if matches!(property_name, "innerHTML" | "outerHTML") {
+        return Some("TrustedHTML");
+    }
+    match (element_namespace, element_local_name, property_name) {
+        ("http://www.w3.org/1999/xhtml", "iframe", "srcdoc") => Some("TrustedHTML"),
+        ("http://www.w3.org/1999/xhtml", "script", "innerText" | "text" | "textContent") => {
+            Some("TrustedScript")
+        }
+        ("http://www.w3.org/1999/xhtml", "script", "src") => Some("TrustedScriptURL"),
+        _ => None,
+    }
+}
+
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub(in crate::native_bridge::element) enum TrustedHtmlSink {
     ElementInnerHtml,
diff --git a/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs b/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs
index 152c72df86..323d59b068 100644
--- a/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs
+++ b/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs
@@ -159,7 +159,7 @@ fn trusted_type_factory_interface_exposes_stable_branded_empty_values() {
 }
 
 #[test]
-fn trusted_type_factory_get_attribute_type_reuses_attribute_sink_classification() {
+fn trusted_type_factory_introspection_reuses_current_sink_classification() {
     let mut vm = new_storage_test_vm("https://trusted-type-attribute-types.test/");
 
     let result = vm
@@ -172,6 +172,7 @@ fn trusted_type_factory_get_attribute_type_reuses_attribute_sink_classification(
   const XLINK = "http://www.w3.org/1999/xlink";
   const OTHER = "https://example.test/namespace";
   const type = (...args) => trustedTypes.getAttributeType(...args);
+  const propertyType = (...args) => trustedTypes.getPropertyType(...args);
   const errorName = callback => {
     try {
       callback();
@@ -180,19 +181,28 @@ fn trusted_type_factory_get_attribute_type_reuses_attribute_sink_classification(
       return error.constructor.name;
     }
   };
-  const descriptor = Object.getOwnPropertyDescriptor(
+  const attributeDescriptor = Object.getOwnPropertyDescriptor(
     TrustedTypePolicyFactory.prototype,
     "getAttributeType"
   );
+  const propertyDescriptor = Object.getOwnPropertyDescriptor(
+    TrustedTypePolicyFactory.prototype,
+    "getPropertyType"
+  );
+  const describe = descriptor => [
+    typeof descriptor.value,
+    descriptor.value.name,
+    descriptor.value.length,
+    descriptor.enumerable,
+    descriptor.configurable
+  ];
 
   return JSON.stringify({
     interface: [
-      typeof descriptor.value,
-      descriptor.value.name,
-      descriptor.value.length,
-      descriptor.enumerable,
-      descriptor.configurable,
-      Object.hasOwn(trustedTypes, "getAttributeType")
+      describe(attributeDescriptor),
+      describe(propertyDescriptor),
+      Object.hasOwn(trustedTypes, "getAttributeType"),
+      Object.hasOwn(trustedTypes, "getPropertyType")
     ],
     htmlDefaults: [
       type("script", "src"),
@@ -213,6 +223,17 @@ fn trusted_type_factory_get_attribute_type_reuses_attribute_sink_classification(
       type("script", "href", SVG, OTHER),
       type("script", "href", SVG.toUpperCase())
     ],
+    properties: [
+      propertyType("script", "text"),
+      propertyType("SCRIPT", "src"),
+      propertyType("script", "sRc"),
+      propertyType("div", "innerHTML"),
+      propertyType("foo", "outerHTML", OTHER),
+      propertyType("script", "src", SVG),
+      propertyType("embed", "src"),
+      propertyType("object", "data"),
+      propertyType("object", "codeBase")
+    ],
     handlers: [
       type("div", "onclick"),
       type("g", "ondblclick", SVG),
@@ -224,17 +245,20 @@ fn trusted_type_factory_get_attribute_type_reuses_attribute_sink_classification(
     errors: [
       errorName(() => type()),
       errorName(() => type("script")),
-      errorName(() => descriptor.value.call({}, "script", "src"))
+      errorName(() => attributeDescriptor.value.call({}, "script", "src")),
+      errorName(() => propertyType()),
+      errorName(() => propertyType("script")),
+      errorName(() => propertyDescriptor.value.call({}, "script", "src"))
     ]
   });
 })()
 "#,
         )
-        .expect("TrustedTypePolicyFactory getAttributeType probe should evaluate");
+        .expect("TrustedTypePolicyFactory introspection probe should evaluate");
 
     assert_eq!(
         result,
-        r#"{"interface":["function","getAttributeType",2,true,true,false],"htmlDefaults":["TrustedScriptURL","TrustedScriptURL","TrustedScriptURL","TrustedScriptURL","TrustedScriptURL",null,null],"urls":["TrustedScriptURL","TrustedScriptURL","TrustedScriptURL",null,"TrustedScriptURL","TrustedScriptURL",null,null],"handlers":["TrustedScript","TrustedScript","TrustedScript",null,null,null],"errors":["TypeError","TypeError","TypeError"]}"#
+        r#"{"interface":[["function","getAttributeType",2,true,true],["function","getPropertyType",2,true,true],false,false],"htmlDefaults":["TrustedScriptURL","TrustedScriptURL","TrustedScriptURL","TrustedScriptURL","TrustedScriptURL",null,null],"urls":[null,null,null,null,"TrustedScriptURL","TrustedScriptURL",null,null],"properties":["TrustedScript","TrustedScriptURL",null,"TrustedHTML","TrustedHTML",null,null,null,null],"handlers":["TrustedScript","TrustedScript","TrustedScript",null,null,null],"errors":["TypeError","TypeError","TypeError","TypeError","TypeError","TypeError"]}"#
     );
 }
 
@@ -1298,7 +1322,7 @@ fn event_handler_attribute_writes_enforce_trusted_script_at_the_attribute_bounda
 }
 
 #[test]
-fn url_attribute_writes_enforce_the_non_iframe_trusted_script_url_sink_table() {
+fn url_attribute_writes_enforce_only_the_current_non_iframe_script_url_sinks() {
     let mut vm = new_storage_test_vm("https://url-attribute-trusted-types.test/");
     vm.set_response_content_security_policies(&["require-trusted-types-for 'script'".to_owned()]);
 
@@ -1333,10 +1357,7 @@ fn url_attribute_writes_enforce_the_non_iframe_trusted_script_url_sink_table() {
     [document.createElement("script"), element => element.setAttribute("src", "plain")],
     [document.createElement("script"), element => element.setAttributeNS(null, "src", null)],
     [document.createElementNS(svg, "script"), element => element.setAttribute("href", "plain")],
-    [document.createElementNS(svg, "script"), element => element.setAttributeNS(xlink, "xlink:href", policy.createScript("wrong"))],
-    [document.createElement("embed"), element => element.setAttribute("src", "plain")],
-    [document.createElement("object"), element => element.setAttribute("data", "plain")],
-    [document.createElement("object"), element => element.setAttribute("codebase", "plain")]
+    [document.createElementNS(svg, "script"), element => element.setAttributeNS(xlink, "xlink:href", policy.createScript("wrong"))]
   ]) {
     try {
       setter(element);
@@ -1352,6 +1373,11 @@ fn url_attribute_writes_enforce_the_non_iframe_trusted_script_url_sink_table() {
   uppercaseSvg.setAttributeNS(null, "HREF", "uppercase");
   const div = document.createElement("div");
   div.setAttribute("src", "plain-div");
+  const legacyEmbed = document.createElement("embed");
+  legacyEmbed.setAttribute("src", "plain-embed");
+  const legacyObject = document.createElement("object");
+  legacyObject.setAttribute("data", "plain-object-data");
+  legacyObject.setAttribute("codebase", "plain-object-codebase");
 
   const defaultCalls = [];
   trustedTypes.createPolicy("default", {
@@ -1381,7 +1407,10 @@ fn url_attribute_writes_enforce_the_non_iframe_trusted_script_url_sink_table() {
     ordinary: [
       ordinary.getAttributeNS("urn:test", "src"),
       uppercaseSvg.getAttribute("HREF"),
-      div.getAttribute("src")
+      div.getAttribute("src"),
+      legacyEmbed.getAttribute("src"),
+      legacyObject.getAttribute("data"),
+      legacyObject.getAttribute("codebase")
     ],
     defaultValues: [
       defaultHtml.getAttribute("src"),
@@ -1397,7 +1426,7 @@ fn url_attribute_writes_enforce_the_non_iframe_trusted_script_url_sink_table() {
 
     assert_eq!(
         result,
-        r#"{"trustedValues":["script.js","script-ns.js","svg.js","svg-xlink.js","embed.js","object-data.js","object-codebase.js"],"rejected":[true,true,true,true,true,true,true],"ordinary":["namespaced","uppercase","plain-div"],"defaultValues":["safe-default-html","safe-default-svg","safe-default-object"],"defaultCalls":[["default-html","TrustedScriptURL","HTMLScriptElement src"],["default-svg","TrustedScriptURL","SVGScriptElement href"],["default-object","TrustedScriptURL","HTMLObjectElement codebase"]]}"#
+        r#"{"trustedValues":["script.js","script-ns.js","svg.js","svg-xlink.js","embed.js","object-data.js","object-codebase.js"],"rejected":[true,true,true,true],"ordinary":["namespaced","uppercase","plain-div","plain-embed","plain-object-data","plain-object-codebase"],"defaultValues":["safe-default-html","safe-default-svg","default-object"],"defaultCalls":[["default-html","TrustedScriptURL","HTMLScriptElement src"],["default-svg","TrustedScriptURL","SVGScriptElement href"]]}"#
     );
 }