diff -Naur opencv-4.13.0.orig/cmake/OpenCVDetectFlatbuffers.cmake opencv-4.13.0/cmake/OpenCVDetectFlatbuffers.cmake
--- opencv-4.13.0.orig/cmake/OpenCVDetectFlatbuffers.cmake	2025-12-31 16:40:27.059687037 +0100
+++ opencv-4.13.0/cmake/OpenCVDetectFlatbuffers.cmake	2025-12-31 16:42:04.245418819 +0100
@@ -1,12 +1,6 @@
 if(WITH_FLATBUFFERS)
-  set(HAVE_FLATBUFFERS 1)
-  set(flatbuffers_VERSION "25.9.23")
-  ocv_install_3rdparty_licenses(flatbuffers "${OpenCV_SOURCE_DIR}/3rdparty/flatbuffers/LICENSE.txt")
-  ocv_add_external_target(flatbuffers "${OpenCV_SOURCE_DIR}/3rdparty/flatbuffers/include" "" "HAVE_FLATBUFFERS=1")
-  set(CUSTOM_STATUS_flatbuffers "    Flatbuffers:" "builtin/3rdparty (${flatbuffers_VERSION})")
-endif()
-
-if(WITH_FLATBUFFERS OR HAVE_FLATBUFFERS)
+  find_package(flatbuffers REQUIRED)
+  set(HAVE_FLATBUFFERS "${flatbuffers_FOUND}")
   list(APPEND CUSTOM_STATUS flatbuffers)
 
   if(HAVE_FLATBUFFERS)
diff -Naur opencv-4.13.0.orig/modules/dnn/misc/tflite/schema_generated.h opencv-4.13.0/modules/dnn/misc/tflite/schema_generated.h
--- opencv-4.13.0.orig/modules/dnn/misc/tflite/schema_generated.h	2025-12-31 16:40:27.131559186 +0100
+++ opencv-4.13.0/modules/dnn/misc/tflite/schema_generated.h	2025-12-31 16:42:33.066044187 +0100
@@ -9,7 +9,7 @@
 // Ensure the included flatbuffers.h is the same version as when this file was
 // generated, otherwise it may not be compatible.
 static_assert(FLATBUFFERS_VERSION_MAJOR == 25 &&
-              FLATBUFFERS_VERSION_MINOR == 9 &&
+              FLATBUFFERS_VERSION_MINOR >= 9 &&
               FLATBUFFERS_VERSION_REVISION == 23,
              "Non-compatible flatbuffers version included");