diff --git a/Core/GDCore/IDE/Events/BehaviorPropertyRenamer.cpp b/Core/GDCore/IDE/Events/BehaviorPropertyRenamer.cpp
new file mode 100644
index 0000000000..a15f0fe27a
--- /dev/null
+++ b/Core/GDCore/IDE/Events/BehaviorPropertyRenamer.cpp
@@ -0,0 +1,21 @@
+#include "BehaviorPropertyRenamer.h"
+
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/WholeProjectRefactorer.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+
+namespace gd {
+
+void BehaviorPropertyRenamer::DoVisitBehavior(gd::Behavior &behavior) {
+  if (behavior.GetTypeName() == behaviorType) {
+    behavior.RenameProperty(oldName, newName);
+  }
+};
+
+BehaviorPropertyRenamer::~BehaviorPropertyRenamer() {}
+
+} // namespace gd
diff --git a/Core/GDCore/IDE/Events/BehaviorPropertyRenamer.h b/Core/GDCore/IDE/Events/BehaviorPropertyRenamer.h
new file mode 100644
index 0000000000..07375571da
--- /dev/null
+++ b/Core/GDCore/IDE/Events/BehaviorPropertyRenamer.h
@@ -0,0 +1,39 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2026 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+#include <set>
+
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Object;
+class Behavior;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Rename a property in behaviors of all objects.
+ */
+class GD_CORE_API BehaviorPropertyRenamer : public ArbitraryObjectsWorker {
+public:
+  BehaviorPropertyRenamer(const gd::String &behaviorType_,
+                          const gd::String &oldName_,
+                          const gd::String &newName_)
+      : behaviorType(behaviorType_), oldName(oldName_), newName(newName_){};
+  virtual ~BehaviorPropertyRenamer();
+
+private:
+  void DoVisitBehavior(gd::Behavior &behavior) override;
+
+  gd::String behaviorType;
+  gd::String oldName;
+  gd::String newName;
+};
+
+}; // namespace gd
diff --git a/Core/GDCore/IDE/Events/BehaviorTypeRenamer.h b/Core/GDCore/IDE/Events/BehaviorTypeRenamer.h
index d6fa1634dc..ae15da6d0c 100644
--- a/Core/GDCore/IDE/Events/BehaviorTypeRenamer.h
+++ b/Core/GDCore/IDE/Events/BehaviorTypeRenamer.h
@@ -4,8 +4,7 @@
  * reserved. This project is released under the MIT License.
  */
 
-#ifndef GDCORE_BEHAVIORTYPERENAMER_H
-#define GDCORE_BEHAVIORTYPERENAMER_H
+#pragma once
 #include <set>
 
 #include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
@@ -34,5 +33,3 @@ class GD_CORE_API BehaviorTypeRenamer : public ArbitraryObjectsWorker {
 };
 
 };  // namespace gd
-
-#endif // GDCORE_BEHAVIORTYPERENAMER_H
diff --git a/Core/GDCore/IDE/Events/ObjectPropertyRenamer.cpp b/Core/GDCore/IDE/Events/ObjectPropertyRenamer.cpp
new file mode 100644
index 0000000000..72c1988b81
--- /dev/null
+++ b/Core/GDCore/IDE/Events/ObjectPropertyRenamer.cpp
@@ -0,0 +1,21 @@
+#include "ObjectPropertyRenamer.h"
+
+#include "GDCore/Events/Instruction.h"
+#include "GDCore/Extensions/Metadata/MetadataProvider.h"
+#include "GDCore/Extensions/PlatformExtension.h"
+#include "GDCore/IDE/WholeProjectRefactorer.h"
+#include "GDCore/Project/Behavior.h"
+#include "GDCore/Project/Object.h"
+#include "GDCore/Project/Project.h"
+
+namespace gd {
+
+void ObjectPropertyRenamer::DoVisitObject(gd::Object &object) {
+  if (object.GetType() == objectType) {
+    object.GetConfiguration().RenameProperty(oldName, newName);
+  }
+};
+
+ObjectPropertyRenamer::~ObjectPropertyRenamer() {}
+
+} // namespace gd
diff --git a/Core/GDCore/IDE/Events/ObjectPropertyRenamer.h b/Core/GDCore/IDE/Events/ObjectPropertyRenamer.h
new file mode 100644
index 0000000000..0590ca07c9
--- /dev/null
+++ b/Core/GDCore/IDE/Events/ObjectPropertyRenamer.h
@@ -0,0 +1,38 @@
+/*
+ * GDevelop Core
+ * Copyright 2008-2026 Florian Rival (Florian.Rival@gmail.com). All rights
+ * reserved. This project is released under the MIT License.
+ */
+
+#pragma once
+#include <set>
+
+#include "GDCore/IDE/Project/ArbitraryObjectsWorker.h"
+#include "GDCore/String.h"
+
+namespace gd {
+class Object;
+class Behavior;
+} // namespace gd
+
+namespace gd {
+
+/**
+ * \brief Rename a property in all custom objects of a given type.
+ */
+class GD_CORE_API ObjectPropertyRenamer : public ArbitraryObjectsWorker {
+public:
+  ObjectPropertyRenamer(const gd::String &objectType_,
+                        const gd::String &oldName_, const gd::String &newName_)
+      : objectType(objectType_), oldName(oldName_), newName(newName_){};
+  virtual ~ObjectPropertyRenamer();
+
+private:
+  void DoVisitObject(gd::Object &object) override;
+
+  gd::String objectType;
+  gd::String oldName;
+  gd::String newName;
+};
+
+}; // namespace gd
diff --git a/Core/GDCore/IDE/WholeProjectRefactorer.cpp b/Core/GDCore/IDE/WholeProjectRefactorer.cpp
index 5180f8fa4f..b732d71ef0 100644
--- a/Core/GDCore/IDE/WholeProjectRefactorer.cpp
+++ b/Core/GDCore/IDE/WholeProjectRefactorer.cpp
@@ -16,6 +16,7 @@
 #include "GDCore/IDE/EventBasedObjectBrowser.h"
 #include "GDCore/IDE/Events/ArbitraryEventsWorker.h"
 #include "GDCore/IDE/Events/BehaviorParametersFiller.h"
+#include "GDCore/IDE/Events/BehaviorPropertyRenamer.h"
 #include "GDCore/IDE/Events/BehaviorTypeRenamer.h"
 #include "GDCore/IDE/Events/CustomObjectTypeRenamer.h"
 #include "GDCore/IDE/Events/EventsBehaviorRenamer.h"
@@ -30,6 +31,7 @@
 #include "GDCore/IDE/Events/InstructionsTypeRenamer.h"
 #include "GDCore/IDE/Events/LinkEventTargetRenamer.h"
 #include "GDCore/IDE/Events/LeaderboardIdRenamer.h"
+#include "GDCore/IDE/Events/ObjectPropertyRenamer.h"
 #include "GDCore/IDE/Events/ProjectElementRenamer.h"
 #include "GDCore/IDE/Project/BehaviorObjectTypeRenamer.h"
 #include "GDCore/IDE/Project/BehaviorsSharedDataBehaviorTypeRenamer.h"
@@ -1021,6 +1023,14 @@ void WholeProjectRefactorer::RenameEventsBasedBehaviorProperty(
   auto &properties = eventsBasedBehavior.GetPropertyDescriptors();
   if (!properties.Has(oldPropertyName))
     return;
+  const auto &behaviorType = gd::PlatformExtension::GetBehaviorFullType(
+      eventsFunctionsExtension.GetName(), eventsBasedBehavior.GetName());
+
+  // Rename the property in behaviors of all objects.
+  const WholeProjectBrowser projectBrowser;
+  auto behaviorPropertyRenamer = gd::BehaviorPropertyRenamer(
+      behaviorType, oldPropertyName, newPropertyName);
+  projectBrowser.ExposeObjects(project, behaviorPropertyRenamer);
 
   if (properties.Get(oldPropertyName).GetType() == "Behavior") {
     // This is a property representing another behavior that must exist on the
@@ -1049,8 +1059,7 @@ void WholeProjectRefactorer::RenameEventsBasedBehaviorProperty(
     gd::ExpressionsRenamer expressionRenamer =
         gd::ExpressionsRenamer(project.GetCurrentPlatform());
     expressionRenamer.SetReplacedBehaviorExpression(
-        gd::PlatformExtension::GetBehaviorFullType(
-            eventsFunctionsExtension.GetName(), eventsBasedBehavior.GetName()),
+        behaviorType,
         EventsBasedBehavior::GetPropertyExpressionName(oldPropertyName),
         EventsBasedBehavior::GetPropertyExpressionName(newPropertyName));
     gd::ProjectBrowserHelper::ExposeProjectEvents(project, expressionRenamer);
@@ -1173,6 +1182,14 @@ void WholeProjectRefactorer::RenameEventsBasedObjectProperty(
   auto &properties = eventsBasedObject.GetPropertyDescriptors();
   if (!properties.Has(oldPropertyName))
     return;
+  const auto &objectType = gd::PlatformExtension::GetObjectFullType(
+      eventsFunctionsExtension.GetName(), eventsBasedObject.GetName());
+
+  // Rename the property in all custom objects of this type.
+  const WholeProjectBrowser projectBrowser;
+  auto objectPropertyRenamer =
+      gd::ObjectPropertyRenamer(objectType, oldPropertyName, newPropertyName);
+  projectBrowser.ExposeObjects(project, objectPropertyRenamer);
 
   // Properties that represent primitive values will be used through
   // their related actions/conditions/expressions. Rename these.
@@ -1185,8 +1202,7 @@ void WholeProjectRefactorer::RenameEventsBasedObjectProperty(
   gd::ExpressionsRenamer expressionRenamer =
       gd::ExpressionsRenamer(project.GetCurrentPlatform());
   expressionRenamer.SetReplacedObjectExpression(
-      gd::PlatformExtension::GetObjectFullType(
-          eventsFunctionsExtension.GetName(), eventsBasedObject.GetName()),
+      objectType,
       EventsBasedObject::GetPropertyExpressionName(oldPropertyName),
       EventsBasedObject::GetPropertyExpressionName(newPropertyName));
   gd::ProjectBrowserHelper::ExposeProjectEvents(project, expressionRenamer);
diff --git a/Core/GDCore/Project/BehaviorConfigurationContainer.h b/Core/GDCore/Project/BehaviorConfigurationContainer.h
index db871271ec..a3e70d93e2 100644
--- a/Core/GDCore/Project/BehaviorConfigurationContainer.h
+++ b/Core/GDCore/Project/BehaviorConfigurationContainer.h
@@ -87,6 +87,17 @@ class GD_CORE_API BehaviorConfigurationContainer {
     return UpdateProperty(content, name, value);
   };
 
+  /**
+   * \brief Called when the IDE wants to rename a custom property of the object
+   * configuration.
+   *
+   * \return false if properties can't be renamed
+   */
+  virtual bool RenameProperty(const gd::String &oldName,
+                              const gd::String &newName) {
+    return RenameProperty(content, oldName, newName);
+  };
+
   /**
    * \brief Called to initialize the content with the default properties
    * for the behavior.
@@ -199,6 +210,18 @@ class GD_CORE_API BehaviorConfigurationContainer {
     return false;
   };
 
+  /**
+   * \brief Called when the IDE wants to rename a custom property of the object
+   * configuration.
+   *
+   * \return false if properties can't be renamed
+   */
+  virtual bool RenameProperty(gd::SerializerElement &behaviorContent,
+                              const gd::String &oldName,
+                              const gd::String &newName) {
+    return false;
+  };
+
   /**
    * \brief Called to initialize the content with the default properties
    * for the behavior.
diff --git a/Core/GDCore/Project/CustomBehavior.cpp b/Core/GDCore/Project/CustomBehavior.cpp
index 0508251114..e46d35ebd5 100644
--- a/Core/GDCore/Project/CustomBehavior.cpp
+++ b/Core/GDCore/Project/CustomBehavior.cpp
@@ -58,3 +58,17 @@ bool CustomBehavior::UpdateProperty(gd::SerializerElement &behaviorContent,
       propertyName,
       newValue);
 }
+
+bool CustomBehavior::RenameProperty(gd::SerializerElement &behaviorContent,
+                                    const gd::String &oldName,
+                                    const gd::String &newName) {
+  if (!project.HasEventsBasedBehavior(GetTypeName())) {
+    return false;
+  }
+  const auto &eventsBasedBehavior =
+      project.GetEventsBasedBehavior(GetTypeName());
+  const auto &properties = eventsBasedBehavior.GetPropertyDescriptors();
+
+  return gd::CustomConfigurationHelper::RenameProperty(
+      properties, behaviorContent, oldName, newName);
+}
diff --git a/Core/GDCore/Project/CustomBehavior.h b/Core/GDCore/Project/CustomBehavior.h
index 52e0c18945..b4ba179958 100644
--- a/Core/GDCore/Project/CustomBehavior.h
+++ b/Core/GDCore/Project/CustomBehavior.h
@@ -37,6 +37,9 @@ protected:
   bool UpdateProperty(gd::SerializerElement &behaviorContent,
                       const gd::String &name, const gd::String &value) override;
   void InitializeContent(gd::SerializerElement &behaviorContent) override;
+  bool RenameProperty(gd::SerializerElement &behaviorContent,
+                              const gd::String &oldName,
+                              const gd::String &newName) override;
 
 private:
   const Project &project; ///< The project is used to get the
diff --git a/Core/GDCore/Project/CustomConfigurationHelper.cpp b/Core/GDCore/Project/CustomConfigurationHelper.cpp
index 8880fc8b5f..8701be9a94 100644
--- a/Core/GDCore/Project/CustomConfigurationHelper.cpp
+++ b/Core/GDCore/Project/CustomConfigurationHelper.cpp
@@ -102,5 +102,19 @@ bool CustomConfigurationHelper::UpdateProperty(
     element.SetBoolValue(newValue == "1");
   }
 
+  return true;
+}
+
+bool CustomConfigurationHelper::RenameProperty(
+    const gd::PropertiesContainer &properties,
+    gd::SerializerElement &configurationContent, const gd::String &oldName,
+    const gd::String &newName) {
+  if (!configurationContent.HasChild(oldName)) {
+    return false;
+  }
+  auto &oldElement = configurationContent.GetChild(oldName);
+  auto &newElement = configurationContent.AddChild(newName);
+  newElement = oldElement;
+  configurationContent.RemoveChild(oldName);
   return true;
 }
\ No newline at end of file
diff --git a/Core/GDCore/Project/CustomConfigurationHelper.h b/Core/GDCore/Project/CustomConfigurationHelper.h
index 5f9b57fb43..cdd8e2572f 100644
--- a/Core/GDCore/Project/CustomConfigurationHelper.h
+++ b/Core/GDCore/Project/CustomConfigurationHelper.h
@@ -3,8 +3,7 @@
  * Copyright 2008-2016 Florian Rival (Florian.Rival@gmail.com). All rights
  * reserved. This project is released under the MIT License.
  */
-#ifndef GDCORE_CUSTOMCONFIGURATIONHELPER_H
-#define GDCORE_CUSTOMCONFIGURATIONHELPER_H
+#pragma once
 
 #include "GDCore/Project/Behavior.h"
 #include "GDCore/Project/EventsBasedBehavior.h"
@@ -38,7 +37,10 @@ public:
       gd::SerializerElement &behaviorContent,
       const gd::String &name,
       const gd::String &value);
+
+  static bool RenameProperty(const gd::PropertiesContainer &properties,
+                             gd::SerializerElement &behaviorContent,
+                             const gd::String &oldName,
+                             const gd::String &newName);
 };
 }  // namespace gd
-
-#endif  // GDCORE_CUSTOMCONFIGURATIONHELPER_H
\ No newline at end of file
diff --git a/Core/GDCore/Project/CustomObjectConfiguration.cpp b/Core/GDCore/Project/CustomObjectConfiguration.cpp
index 4a03bd8e32..a9f252b209 100644
--- a/Core/GDCore/Project/CustomObjectConfiguration.cpp
+++ b/Core/GDCore/Project/CustomObjectConfiguration.cpp
@@ -131,6 +131,20 @@ bool CustomObjectConfiguration::UpdateProperty(const gd::String& propertyName,
         newValue);
 }
 
+bool CustomObjectConfiguration::RenameProperty(const gd::String& oldName, const gd::String& newName) {
+    if (!project->HasEventsBasedObject(GetType())) {
+      return false;
+    }
+    const auto &eventsBasedObject = project->GetEventsBasedObject(GetType());
+    const auto &properties = eventsBasedObject.GetPropertyDescriptors();
+
+    return gd::CustomConfigurationHelper::RenameProperty(
+        properties,
+        objectContent,
+        oldName,
+        newName);
+};
+
 std::map<gd::String, gd::PropertyDescriptor>
 CustomObjectConfiguration::GetInitialInstanceProperties(
     const gd::InitialInstance &initialInstance) {
diff --git a/Core/GDCore/Project/CustomObjectConfiguration.h b/Core/GDCore/Project/CustomObjectConfiguration.h
index ccbc532a81..4152027fca 100644
--- a/Core/GDCore/Project/CustomObjectConfiguration.h
+++ b/Core/GDCore/Project/CustomObjectConfiguration.h
@@ -57,6 +57,7 @@ public:
 
   std::map<gd::String, gd::PropertyDescriptor> GetProperties() const override;
   bool UpdateProperty(const gd::String& name, const gd::String& value) override;
+  bool RenameProperty(const gd::String& oldName, const gd::String& newName) override;
 
   std::map<gd::String, gd::PropertyDescriptor> GetInitialInstanceProperties(
       const gd::InitialInstance& instance) override;
@@ -66,6 +67,7 @@ public:
 
   void ExposeResources(gd::ArbitraryResourceWorker& worker) override;
 
+
   /**
    * \brief Get the name of the events-based object variant used by this custom object.
    */
diff --git a/Core/GDCore/Project/ObjectConfiguration.h b/Core/GDCore/Project/ObjectConfiguration.h
index ed86abded7..3ef95d9abf 100644
--- a/Core/GDCore/Project/ObjectConfiguration.h
+++ b/Core/GDCore/Project/ObjectConfiguration.h
@@ -99,6 +99,17 @@ class GD_CORE_API ObjectConfiguration {
   virtual bool UpdateProperty(const gd::String& name, const gd::String& value) {
     return false;
   };
+
+  /**
+   * \brief Called when the IDE wants to rename a custom property of the object
+   * configuration.
+   *
+   * \return false if properties can't be renamed
+   */
+  virtual bool RenameProperty(const gd::String &oldName,
+                              const gd::String &newName) {
+    return false;
+  };
   ///@}
 
   /** \name Drawing and editing initial instances
diff --git a/Core/tests/WholeProjectRefactorer.cpp b/Core/tests/WholeProjectRefactorer.cpp
index 92c3d85098..9685a6809f 100644
--- a/Core/tests/WholeProjectRefactorer.cpp
+++ b/Core/tests/WholeProjectRefactorer.cpp
@@ -1053,16 +1053,19 @@ SetupProjectWithEventsFunctionExtension(gd::Project &project) {
     // Add a property:
     eventsBasedBehavior.GetPropertyDescriptors()
         .InsertNew("MyProperty", 0)
-        .SetType("Number");
+        .SetType("Number")
+        .SetValue("0");
     // Add a shared property:
     eventsBasedBehavior.GetSharedPropertyDescriptors()
         .InsertNew("MySharedProperty", 0)
-        .SetType("Number");
+        .SetType("Number")
+        .SetValue("0");
     // The same name is used for another shared property to ensure there is no name
     // collision.
     eventsBasedBehavior.GetSharedPropertyDescriptors()
         .InsertNew("MyProperty", 0)
-        .SetType("Number");
+        .SetType("Number")
+        .SetValue("0");
   }
 
   // Add a events based object
@@ -3660,6 +3663,37 @@ TEST_CASE("WholeProjectRefactorer", "[common]") {
             "MyExtension::GetVariableAsNumber(MyVariable.MyChild[MyRenamedProperty])");
   }
 
+  SECTION("(Events based behavior) property renamed (in objects)") {
+    gd::Project project;
+    gd::Platform platform;
+    SetupProjectWithDummyPlatform(project, platform);
+    auto &eventsExtension = SetupProjectWithEventsFunctionExtension(project);
+    auto &eventsBasedBehavior =
+        eventsExtension.GetEventsBasedBehaviors().Get("MyEventsBasedBehavior");
+    REQUIRE(eventsBasedBehavior.GetPropertyDescriptors().Has("MyProperty"));
+    auto &property =
+        eventsBasedBehavior.GetPropertyDescriptors().Get("MyProperty");
+
+    auto &layout = project.GetLayout("Scene");
+    auto &object = layout.GetObjects().GetObject("ObjectWithMyBehavior");
+    auto &behavior = object.GetBehavior("MyBehavior");
+    behavior.UpdateProperty("MyProperty", "123");
+    {
+      auto properties = behavior.GetProperties();
+      REQUIRE(properties.find("MyProperty") != properties.end());
+      REQUIRE(properties.at("MyProperty").GetValue() == "123");
+    }
+
+    gd::WholeProjectRefactorer::RenameEventsBasedBehaviorProperty(
+        project, eventsExtension, eventsBasedBehavior, "MyProperty",
+        "MyRenamedProperty");
+    property.SetName("MyRenamedProperty");
+
+    auto properties = behavior.GetProperties();
+    REQUIRE(properties.find("MyRenamedProperty") != properties.end());
+    REQUIRE(properties.at("MyRenamedProperty").GetValue() == "123");
+  }
+
   SECTION("(Events based behavior) property renamed (in variable setter)") {
     gd::Project project;
     gd::Platform platform;
@@ -3924,6 +3958,37 @@ TEST_CASE("WholeProjectRefactorer", "[common]") {
             "MyExtension::GetVariableAsNumber(MyVariable.MyChild[MyRenamedProperty])");
   }
 
+  SECTION("(Events based object) property renamed (in objects)") {
+    gd::Project project;
+    gd::Platform platform;
+    SetupProjectWithDummyPlatform(project, platform);
+    auto &eventsExtension = SetupProjectWithEventsFunctionExtension(project);
+    auto &eventsBasedObject =
+        eventsExtension.GetEventsBasedObjects().Get("MyEventsBasedObject");
+    REQUIRE(eventsBasedObject.GetPropertyDescriptors().Has("MyProperty"));
+    auto &property =
+        eventsBasedObject.GetPropertyDescriptors().Get("MyProperty");
+
+    auto &layout = project.GetLayout("Scene");
+    auto &object = layout.GetObjects().GetObject("MyCustomObject");
+    auto &objectConfiguration = object.GetConfiguration();
+    objectConfiguration.UpdateProperty("MyProperty", "123");
+    {
+      auto properties = objectConfiguration.GetProperties();
+      REQUIRE(properties.find("MyProperty") != properties.end());
+      REQUIRE(properties.at("MyProperty").GetValue() == "123");
+    }
+
+    gd::WholeProjectRefactorer::RenameEventsBasedObjectProperty(
+        project, eventsExtension, eventsBasedObject, "MyProperty",
+        "MyRenamedProperty");
+    property.SetName("MyRenamedProperty");
+
+    auto properties = objectConfiguration.GetProperties();
+    REQUIRE(properties.find("MyRenamedProperty") != properties.end());
+    REQUIRE(properties.at("MyRenamedProperty").GetValue() == "123");
+  }
+
   SECTION("(Events based object) property renamed (in variable setter)") {
     gd::Project project;
     gd::Platform platform;