diff --git a/ports/opencv4/0002-install-options.patch b/ports/opencv4/0002-install-options.patch
index 7e6d585599805b..00f49d7050d9e6 100644
--- a/ports/opencv4/0002-install-options.patch
+++ b/ports/opencv4/0002-install-options.patch
@@ -1,3 +1,5 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 150a018..36d3019 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
 @@ -638,7 +638,7 @@ set(OPENCV_EXTRA_MODULES_PATH "" CACHE PATH "Where to look for additional OpenCV
@@ -9,7 +11,7 @@
    include(cmake/OpenCVDetectPython.cmake)
  endif()
  
-@@ -730,6 +730,7 @@ endif()
+@@ -701,6 +701,7 @@ endif()
  # ----------------------------------------------------------------------------
  #       CHECK FOR SYSTEM LIBRARIES, OPTIONS, ETC..
  # ----------------------------------------------------------------------------
@@ -17,6 +19,8 @@
  if(UNIX OR MINGW)
    if(NOT APPLE_FRAMEWORK OR OPENCV_ENABLE_PKG_CONFIG)
      if(CMAKE_CROSSCOMPILING AND NOT DEFINED ENV{PKG_CONFIG_LIBDIR} AND NOT DEFINED ENV{PKG_CONFIG_SYSROOT_DIR}
+diff --git a/cmake/OpenCVCompilerOptions.cmake b/cmake/OpenCVCompilerOptions.cmake
+index 512e6d1..fd02b6b 100644
 --- a/cmake/OpenCVCompilerOptions.cmake
 +++ b/cmake/OpenCVCompilerOptions.cmake
 @@ -306,7 +306,6 @@ if(MSVC)
@@ -27,9 +31,11 @@
      set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE} /debug")
      set(OPENCV_EXTRA_SHARED_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_SHARED_LINKER_FLAGS_RELEASE} /debug")
      set(OPENCV_EXTRA_MODULE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_MODULE_LINKER_FLAGS_RELEASE} /debug")
+diff --git a/cmake/OpenCVGenConfig.cmake b/cmake/OpenCVGenConfig.cmake
+index c5b7ab1..399b47e 100644
 --- a/cmake/OpenCVGenConfig.cmake
 +++ b/cmake/OpenCVGenConfig.cmake
-@@ -118,18 +118,18 @@ function(ocv_gen_config TMP_DIR NESTED_PATH ROOT_NAME)
+@@ -131,18 +131,18 @@ function(ocv_gen_config TMP_DIR NESTED_PATH ROOT_NAME)
    endif()
  endfunction()
  
@@ -51,6 +57,8 @@
    if(CMAKE_HOST_SYSTEM_NAME MATCHES Windows AND NOT OPENCV_SKIP_CMAKE_ROOT_CONFIG)
      ocv_gen_config("${CMAKE_BINARY_DIR}/win-install"
                     "${OPENCV_INSTALL_BINARIES_PREFIX}${OPENCV_INSTALL_BINARIES_SUFFIX}"
+diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
+index 1f0d720..0bb1ff7 100644
 --- a/data/CMakeLists.txt
 +++ b/data/CMakeLists.txt
 @@ -1,8 +1,6 @@
diff --git a/ports/opencv4/0003-force-package-requirements.patch b/ports/opencv4/0003-force-package-requirements.patch
index 12c55a425254d7..cc546840c57567 100644
--- a/ports/opencv4/0003-force-package-requirements.patch
+++ b/ports/opencv4/0003-force-package-requirements.patch
@@ -1,3 +1,5 @@
+diff --git a/cmake/OpenCVFindLibsGrfmt.cmake b/cmake/OpenCVFindLibsGrfmt.cmake
+index 8c7bc93..88a1db9 100644
 --- a/cmake/OpenCVFindLibsGrfmt.cmake
 +++ b/cmake/OpenCVFindLibsGrfmt.cmake
 @@ -16,6 +16,7 @@ if(WITH_ZLIB_NG)
@@ -92,7 +94,7 @@
        set(SPNG_LIBRARIES ${SPNG_LIBRARY})
      else()
        if(PkgConfig_FOUND)
-@@ -331,7 +332,7 @@ if(NOT HAVE_SPNG AND WITH_PNG)
+@@ -334,7 +335,7 @@ if(NOT HAVE_SPNG AND WITH_PNG)
      ocv_clear_vars(PNG_FOUND)
    else()
      ocv_clear_internal_cache_vars(PNG_LIBRARY PNG_INCLUDE_DIR)
@@ -101,7 +103,7 @@
    endif()
  
    if(NOT PNG_FOUND)
-@@ -354,7 +355,8 @@ if(WITH_OPENEXR)
+@@ -357,7 +358,8 @@ if(WITH_OPENEXR)
    ocv_clear_vars(HAVE_OPENEXR)
    if(NOT BUILD_OPENEXR)
      ocv_clear_internal_cache_vars(OPENEXR_INCLUDE_PATHS OPENEXR_LIBRARIES OPENEXR_ILMIMF_LIBRARY OPENEXR_VERSION)
@@ -111,7 +113,7 @@
    endif()
  
    if(OPENEXR_FOUND)
-@@ -374,7 +376,7 @@ endif()
+@@ -377,7 +379,7 @@ endif()
  
  # --- GDAL (optional) ---
  if(WITH_GDAL)
@@ -120,7 +122,7 @@
  
      if(NOT GDAL_FOUND)
          set(HAVE_GDAL NO)
-@@ -386,7 +388,7 @@ if(WITH_GDAL)
+@@ -389,7 +391,7 @@ if(WITH_GDAL)
  endif()
  
  if(WITH_GDCM)
@@ -129,9 +131,11 @@
    if(NOT GDCM_FOUND)
      set(HAVE_GDCM NO)
      ocv_clear_vars(GDCM_VERSION GDCM_LIBRARIES)
+diff --git a/modules/imgcodecs/CMakeLists.txt b/modules/imgcodecs/CMakeLists.txt
+index c322645..1d5ea0d 100644
 --- a/modules/imgcodecs/CMakeLists.txt
 +++ b/modules/imgcodecs/CMakeLists.txt
-@@ -30,7 +30,7 @@ endif()
+@@ -25,7 +25,7 @@ endif()
  
  if(HAVE_WEBP)
    add_definitions(-DHAVE_WEBP)
diff --git a/ports/opencv4/0007-contrib-fix-hdf5.patch b/ports/opencv4/0007-contrib-fix-hdf5.patch
index 6b4a033035dbc5..4ef5f669135645 100644
--- a/ports/opencv4/0007-contrib-fix-hdf5.patch
+++ b/ports/opencv4/0007-contrib-fix-hdf5.patch
@@ -1,3 +1,5 @@
+diff --git a/modules/hdf/CMakeLists.txt b/modules/hdf/CMakeLists.txt
+index 2a1ae68..e302cf7 100644
 --- a/modules/hdf/CMakeLists.txt
 +++ b/modules/hdf/CMakeLists.txt
 @@ -1,25 +1,7 @@
@@ -21,9 +23,9 @@
 -else()
 -  if(NOT CMAKE_CROSSCOMPILING) # iOS build should not reuse OSX package
      find_package(HDF5)
-+    set(HDF5_INCLUDE_DIRS "${HDF5_INCLUDE_DIR}")
 -  endif()
 -endif()
++    set(HDF5_INCLUDE_DIRS "${HDF5_INCLUDE_DIR}")
  
  if(NOT HDF5_FOUND)
      ocv_module_disable(hdf) # no return
diff --git a/ports/opencv4/0022-android-use-vcpkg-cpu-features.patch b/ports/opencv4/0022-android-use-vcpkg-cpu-features.patch
index 2b1faa299e6817..75949bcf24a6ac 100644
--- a/ports/opencv4/0022-android-use-vcpkg-cpu-features.patch
+++ b/ports/opencv4/0022-android-use-vcpkg-cpu-features.patch
@@ -1,8 +1,8 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 79a0c96270..e6b1aefb9b 100644
+index 2dc1aaa..04332e2 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -789,7 +789,9 @@ endif()
+@@ -805,7 +805,9 @@ endif()
  # ----------------------------------------------------------------------------
  
  if(ANDROID AND WITH_CPUFEATURES)
diff --git a/ports/opencv4/0026-cuda-msvc-preprocessor.patch b/ports/opencv4/0026-cuda-msvc-preprocessor.patch
new file mode 100644
index 00000000000000..9834d2ae8e711c
--- /dev/null
+++ b/ports/opencv4/0026-cuda-msvc-preprocessor.patch
@@ -0,0 +1,14 @@
+diff --git a/cmake/OpenCVUtils.cmake b/cmake/OpenCVUtils.cmake
+index 5886f4f..5f294b5 100644
+--- a/cmake/OpenCVUtils.cmake
++++ b/cmake/OpenCVUtils.cmake
+@@ -1566,6 +1566,9 @@ macro(ocv_add_cuda_compile_flags)
+   target_compile_options(${target} PRIVATE $<$<COMPILE_LANGUAGE:CUDA>: ${CUDA_NVCC_FLAGS}
+   "-Xcompiler=${CMAKE_CXX_FLAGS_CUDA} $<$<CONFIG:Debug>:${CMAKE_CXX_FLAGS_DEBUG_CUDA}> \
+   $<$<CONFIG:Release>:${CMAKE_CXX_FLAGS_RELEASE_CUDA}>" >)
++  if(MSVC)
++    target_compile_options(${target} PRIVATE $<$<COMPILE_LANGUAGE:CUDA>:-Xcompiler=/Zc:preprocessor>)
++  endif()
+ endmacro()
+ 
+ function(ocv_add_executable target)
diff --git a/ports/opencv4/portfile.cmake b/ports/opencv4/portfile.cmake
index 8d205a66fed44b..e4be1a89ba6b1f 100644
--- a/ports/opencv4/portfile.cmake
+++ b/ports/opencv4/portfile.cmake
@@ -3,9 +3,16 @@ set(USE_QT_VERSION "6")
 # fix to get version from eigen after v3.4.0
 vcpkg_download_distfile(
     PATCH1_FILE
-    URLS https://github.com/opencv/opencv/commit/468de9b36740b3355f0d5cd8be2ce28b340df120.patch?full_index=1
+    URLS "https://github.com/opencv/opencv/commit/468de9b36740b3355f0d5cd8be2ce28b340df120.patch?full_index=1"
     SHA512 09ee552fcd9a96359230104d7bf8610a63e05d743a3b51d58c6469331729a6440444e05c616464380dbebaefdd7ee6fb06cac5fc70694af85f9c8d40201aad10
-    FILENAME 468de9b36740b3355f0d5cd8be2ce28b340df120.patch
+    FILENAME "468de9b36740b3355f0d5cd8be2ce28b340df120.patch"
+)
+
+vcpkg_download_distfile(
+    CUDA_13_SUPPORT_PATCH
+    URLS "https://github.com/opencv/opencv/commit/f0888a10e8266b2202d930c6974433a421e6f9a7.diff?full_index=1"
+    SHA512 6efbc9f7e4ad158e648632060bac6ecb542239f1f656774378e6a2beaa42f094784c3b2755b44d599fe4eed69dd9f1f461e0be1ebcd57f9ebc261ead739ed7d5
+    FILENAME "opencv4-support-cuda-13-f0888a10e8266b2202d930c6974433a421e6f9a7.diff"
 )
 
 vcpkg_from_github(
@@ -32,8 +39,11 @@ vcpkg_from_github(
       0023-ffmpeg8-support.patch
       0024-openvino-const-tensor-data.patch
       0025-fix-cuda-host-std-flag-forwarding.patch
+      0026-cuda-msvc-preprocessor.patch
       "${PATCH1_FILE}"
+      "${CUDA_13_SUPPORT_PATCH}"
 )
+
 # Disallow accidental build of vendored copies
 file(GLOB third_party "${SOURCE_PATH}/3rdparty/*")
 list(FILTER third_party EXCLUDE REGEX "/ippicv\$")
@@ -198,6 +208,18 @@ if(VCPKG_TARGET_IS_ANDROID AND (VCPKG_TARGET_ARCHITECTURE MATCHES "^arm"))
 endif()
 
 if("contrib" IN_LIST FEATURES)
+  vcpkg_download_distfile(CONTRIB_CUDA_NAMESPACE_FIX
+    URLS "https://github.com/opencv/opencv_contrib/commit/f2854f4f5e7b67d4e073ea002ae0174d437e2962.diff?full_index=1"
+    FILENAME "opencv4-contrib-cuda13-namespace-fix-f2854f4f5e7b67d4e073ea002ae0174d437e2962.diff"
+    SHA512 1065406fef35ffdfa4d27e991cd96df915e61b1ff4d17df391658a5eb069755b437a6546aaf05eac7b04b616882eb52b121ebe36c7f0af63e3040bda574ca3ed
+  )
+
+  vcpkg_download_distfile(CONTRIB_CUDA_NOT1_FIX
+    URLS "https://github.com/opencv/opencv_contrib/commit/f49f0aef3c8d654c5dc2cf00884ca4f1baf43547.diff?full_index=1"
+    FILENAME "opencv4-contrib-cuda13-not1-fix-f49f0aef3c8d654c5dc2cf00884ca4f1baf43547.diff"
+    SHA512 b1e46be570417a26aec4b2a6e1824008f92c404fb67f307218fdf386074b51ca3ea063516517449631a8dd2ca487b0736c1978a3a5e38f88686c25802af4f300
+  )
+
   vcpkg_from_github(
     OUT_SOURCE_PATH CONTRIB_SOURCE_PATH
     REPO opencv/opencv_contrib
@@ -209,6 +231,8 @@ if("contrib" IN_LIST FEATURES)
       0013-contrib-fix-ogre.patch
       0016-contrib-fix-freetype.patch
       0018-contrib-fix-tesseract.patch
+      "${CONTRIB_CUDA_NAMESPACE_FIX}"
+      "${CONTRIB_CUDA_NOT1_FIX}"
   )
 
   set(BUILD_WITH_CONTRIB_FLAG "-DOPENCV_EXTRA_MODULES_PATH=${CONTRIB_SOURCE_PATH}/modules")
diff --git a/ports/opencv4/vcpkg.json b/ports/opencv4/vcpkg.json
index 5559fe7722fda3..002d966269dd5f 100644
--- a/ports/opencv4/vcpkg.json
+++ b/ports/opencv4/vcpkg.json
@@ -1,7 +1,7 @@
 {
   "name": "opencv4",
   "version": "4.12.0",
-  "port-version": 2,
+  "port-version": 3,
   "description": "Open Source Computer Vision Library",
   "homepage": "https://opencv.org/",
   "documentation": "https://docs.opencv.org/4.12.0/",
diff --git a/versions/baseline.json b/versions/baseline.json
index 256afed97694d5..29ffbe16ff0199 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -7310,7 +7310,7 @@
     },
     "opencv4": {
       "baseline": "4.12.0",
-      "port-version": 2
+      "port-version": 3
     },
     "opendnp3": {
       "baseline": "3.1.2",
diff --git a/versions/o-/opencv4.json b/versions/o-/opencv4.json
index fcb761b7d59a85..a27dee086aa998 100644
--- a/versions/o-/opencv4.json
+++ b/versions/o-/opencv4.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "0022247a58e672802c0a0beed9515b6a5288a244",
+      "version": "4.12.0",
+      "port-version": 3
+    },
     {
       "git-tree": "f0ebe6eda408a578b47229dc43c24c2bd0d3edc8",
       "version": "4.12.0",