CVE-2026-44827

@@ -120,6 +120,7 @@ def from_config(cls, pretrained_model_name_or_path_or_dict: str | os.PathLike |
                 subfolder=subfolder,
                 module_file=module_file,
                 class_name=class_name,
+                trust_remote_code=trust_remote_code,
                 **hub_kwargs,
             )
         else:
@@ -143,6 +144,7 @@ def from_config(cls, pretrained_model_name_or_path_or_dict: str | os.PathLike |
                 importable_classes=ALL_IMPORTABLE_CLASSES,
                 pipelines=None,
                 is_pipeline_module=False,
+                trust_remote_code=trust_remote_code,
             )
 
         if model_cls is None:
@@ -318,6 +320,7 @@ def from_pretrained(cls, pretrained_model_or_path: str | os.PathLike | None = No
                 subfolder=subfolder,
                 module_file=module_file,
                 class_name=class_name,
+                trust_remote_code=trust_remote_code,
                 **hub_kwargs,
             )
         else:

@@ -437,6 +437,7 @@ def from_pretrained(
             pretrained_model_name_or_path,
             module_file=module_file,
             class_name=class_name,
+            trust_remote_code=trust_remote_code,
             **hub_kwargs,
         )
         expected_kwargs, optional_kwargs = block_cls._get_signature_keys(block_cls)

@@ -410,7 +410,14 @@ def simple_get_class_obj(library_name, class_name):
 
 
 def get_class_obj_and_candidates(
-    library_name, class_name, importable_classes, pipelines, is_pipeline_module, component_name=None, cache_dir=None
+    library_name,
+    class_name,
+    importable_classes,
+    pipelines,
+    is_pipeline_module,
+    component_name=None,
+    cache_dir=None,
+    trust_remote_code: bool = False,
 ):
     """Simple helper method to retrieve class object of module as well as potential parent class objects"""
     component_folder = os.path.join(cache_dir, component_name) if component_name and cache_dir else None
@@ -426,7 +433,10 @@ def get_class_obj_and_candidates(
     elif component_folder and os.path.isfile(os.path.join(component_folder, library_name + ".py")):
         # load custom component
         class_obj = get_class_from_dynamic_module(
-            component_folder, module_file=library_name + ".py", class_name=class_name
+            component_folder,
+            module_file=library_name + ".py",
+            class_name=class_name,
+            trust_remote_code=trust_remote_code,
         )
         class_candidates = dict.fromkeys(importable_classes.keys(), class_obj)
     else:
@@ -450,6 +460,7 @@ def _get_custom_pipeline_class(
     class_name=None,
     cache_dir=None,
     revision=None,
+    trust_remote_code: bool = False,
 ):
     if custom_pipeline.endswith(".py"):
         path = Path(custom_pipeline)
@@ -473,6 +484,7 @@ def _get_custom_pipeline_class(
         class_name=class_name,
         cache_dir=cache_dir,
         revision=revision,
+        trust_remote_code=trust_remote_code,
     )
 
 
@@ -486,6 +498,7 @@ def _get_pipeline_class(
     class_name=None,
     cache_dir=None,
     revision=None,
+    trust_remote_code: bool = False,
 ):
     if custom_pipeline is not None:
         return _get_custom_pipeline_class(
@@ -495,6 +508,7 @@ def _get_pipeline_class(
             class_name=class_name,
             cache_dir=cache_dir,
             revision=revision,
+            trust_remote_code=trust_remote_code,
         )
 
     if class_obj.__name__ != "DiffusionPipeline" and class_obj.__name__ != "ModularPipeline":
@@ -766,6 +780,7 @@ def load_sub_model(
     disable_mmap: bool,
     quantization_config: Any | None = None,
     use_flashpack: bool = False,
+    trust_remote_code: bool = False,
 ):
     """Helper method to load the module `name` from `library_name` and `class_name`"""
     from ..quantizers import PipelineQuantizationConfig
@@ -780,6 +795,7 @@ def load_sub_model(
         is_pipeline_module,
         component_name=name,
         cache_dir=cached_folder,
+        trust_remote_code=trust_remote_code,
     )
 
     load_method_name = None

@@ -787,6 +787,7 @@ def from_pretrained(cls, pretrained_model_name_or_path: str | os.PathLike, **kwa
         quantization_config = kwargs.pop("quantization_config", None)
         use_flashpack = kwargs.pop("use_flashpack", False)
         disable_mmap = kwargs.pop("disable_mmap", False)
+        trust_remote_code = kwargs.pop("trust_remote_code", False)
 
         if torch_dtype is not None and not isinstance(torch_dtype, dict) and not isinstance(torch_dtype, torch.dtype):
             torch_dtype = torch.float32
@@ -871,6 +872,7 @@ def from_pretrained(cls, pretrained_model_name_or_path: str | os.PathLike, **kwa
                 variant=variant,
                 dduf_file=dduf_file,
                 load_connected_pipeline=load_connected_pipeline,
+                trust_remote_code=trust_remote_code,
                 **kwargs,
             )
         else:
@@ -928,6 +930,7 @@ def from_pretrained(cls, pretrained_model_name_or_path: str | os.PathLike, **kwa
             class_name=custom_class_name,
             cache_dir=cache_dir,
             revision=custom_revision,
+            trust_remote_code=trust_remote_code,
         )
 
         if device_map is not None and pipeline_class._load_connected_pipes:
@@ -1077,6 +1080,7 @@ def load_module(name, value):
                     disable_mmap=disable_mmap,
                     quantization_config=quantization_config,
                     use_flashpack=use_flashpack,
+                    trust_remote_code=trust_remote_code,
                 )
                 logger.info(
                     f"Loaded {name} as {class_name} from `{name}` subfolder of {pretrained_model_name_or_path}."
@@ -1684,21 +1688,6 @@ def download(cls, pretrained_model_name, **kwargs) -> str | os.PathLike:
                 custom_class_name = config_dict["_class_name"][1]
 
             load_pipe_from_hub = custom_pipeline is not None and f"{custom_pipeline}.py" in filenames
-            load_components_from_hub = len(custom_components) > 0
-
-            if load_pipe_from_hub and not trust_remote_code:
-                raise ValueError(
-                    f"The repository for {pretrained_model_name} contains custom code in {custom_pipeline}.py which must be executed to correctly "
-                    f"load the model. You can inspect the repository content at https://hf.co/{pretrained_model_name}/blob/main/{custom_pipeline}.py.\n"
-                    f"Please pass the argument `trust_remote_code=True` to allow custom code to be run."
-                )
-
-            if load_components_from_hub and not trust_remote_code:
-                raise ValueError(
-                    f"The repository for {pretrained_model_name} contains custom code in {'.py, '.join([os.path.join(k, v) for k, v in custom_components.items()])} which must be executed to correctly "
-                    f"load the model. You can inspect the repository content at {', '.join([f'https://hf.co/{pretrained_model_name}/{k}/{v}.py' for k, v in custom_components.items()])}.\n"
-                    f"Please pass the argument `trust_remote_code=True` to allow custom code to be run."
-                )
 
             # retrieve passed components that should not be downloaded
             pipeline_class = _get_pipeline_class(
@@ -1711,6 +1700,7 @@ def download(cls, pretrained_model_name, **kwargs) -> str | os.PathLike:
                 class_name=custom_class_name,
                 cache_dir=cache_dir,
                 revision=custom_revision,
+                trust_remote_code=trust_remote_code,
             )
             expected_components, _ = cls._get_signature_keys(pipeline_class)
             passed_components = [k for k in expected_components if k in kwargs]
@@ -2127,13 +2117,16 @@ def from_pipe(cls, pipeline, **kwargs):
 
         original_config = dict(pipeline.config)
         torch_dtype = kwargs.pop("torch_dtype", torch.float32)
+        trust_remote_code = kwargs.pop("trust_remote_code", False)
 
         # derive the pipeline class to instantiate
         custom_pipeline = kwargs.pop("custom_pipeline", None)
         custom_revision = kwargs.pop("custom_revision", None)
 
         if custom_pipeline is not None:
-            pipeline_class = _get_custom_pipeline_class(custom_pipeline, revision=custom_revision)
+            pipeline_class = _get_custom_pipeline_class(
+                custom_pipeline, revision=custom_revision, trust_remote_code=trust_remote_code
+            )
         else:
             pipeline_class = cls
 

@@ -254,6 +254,7 @@ def get_cached_module_file(
     revision: str | None = None,
     local_files_only: bool = False,
     local_dir: str | None = None,
+    trust_remote_code: bool = False,
 ):
     """
     Prepares Downloads a module from a local folder or a distant repo and returns its path inside the cached
@@ -289,6 +290,10 @@ def get_cached_module_file(
             identifier allowed by git.
         local_files_only (`bool`, *optional*, defaults to `False`):
             If `True`, will only try to load the tokenizer configuration from local files.
+        trust_remote_code (`bool`, *optional*, defaults to `False`):
+            Whether or not to allow for custom pipelines and components defined on the Hub in their own files. This
+            option should only be set to `True` for repositories you trust and in which you have read the code, as it
+            will execute code present on the Hub on your local machine.
 
     > [!TIP] > You may pass a token in `token` if you are not logged in (`hf auth login`) and want to use private or
     [gated > models](https://huggingface.co/docs/hub/models-gated#gated-models).
@@ -299,15 +304,29 @@ def get_cached_module_file(
     # Download and cache module_file from the repo `pretrained_model_name_or_path` of grab it if it's a local file.
     pretrained_model_name_or_path = str(pretrained_model_name_or_path)
 
+    if DIFFUSERS_DISABLE_REMOTE_CODE:
+        raise ValueError(
+            "Downloading remote code is disabled globally via the DIFFUSERS_DISABLE_REMOTE_CODE environment variable."
+        )
+
     if subfolder is not None:
         module_file_or_url = os.path.join(pretrained_model_name_or_path, subfolder, module_file)
     else:
         module_file_or_url = os.path.join(pretrained_model_name_or_path, module_file)
 
-    if os.path.isfile(module_file_or_url):
+    is_local_file = os.path.isfile(module_file_or_url)
+    is_community_pipeline = not is_local_file and pretrained_model_name_or_path.count("/") == 0
+
+    if is_local_file:
         resolved_module_file = module_file_or_url
         submodule = "local"
-    elif pretrained_model_name_or_path.count("/") == 0:
+        if not trust_remote_code:
+            raise ValueError(
+                f"The directory {pretrained_model_name_or_path} contains custom code in {module_file} which must be executed to correctly "
+                f"load the model. You can inspect the file content at {module_file_or_url}.\n"
+                f"Pass `trust_remote_code=True` to allow loading remote code modules."
+            )
+    elif is_community_pipeline:
         available_versions = get_diffusers_versions()
         # cut ".dev0"
         latest_version = "v" + ".".join(__version__.split(".")[:3])
@@ -349,6 +368,12 @@ def get_cached_module_file(
             logger.error(f"Could not locate the {module_file} inside {pretrained_model_name_or_path}.")
             raise
     else:
+        if not trust_remote_code:
+            raise ValueError(
+                f"The repository for {pretrained_model_name_or_path} contains custom code in {module_file} which must be executed to correctly "
+                f"load the model. You can inspect the repository content at https://hf.co/{pretrained_model_name_or_path}/blob/main/{module_file}.\n"
+                f"Pass `trust_remote_code=True` to allow loading remote code modules."
+            )
         try:
             # Load from URL or cache if already cached
             resolved_module_file = hf_hub_download(
@@ -426,6 +451,7 @@ def get_cached_module_file(
                     revision=revision,
                     local_files_only=local_files_only,
                     local_dir=local_dir,
+                    trust_remote_code=trust_remote_code,
                 )
     return os.path.join(full_submodule, module_file)
 
@@ -443,6 +469,7 @@ def get_class_from_dynamic_module(
     revision: str | None = None,
     local_files_only: bool = False,
     local_dir: str | None = None,
+    trust_remote_code: bool = False,
 ):
     """
     Extracts a class from a module file, present in the local folder or repository of a model.
@@ -482,6 +509,10 @@ def get_class_from_dynamic_module(
             identifier allowed by git.
         local_files_only (`bool`, *optional*, defaults to `False`):
             If `True`, will only try to load the tokenizer configuration from local files.
+        trust_remote_code (`bool`, *optional*, defaults to `False`):
+            Whether or not to allow for custom pipelines and components defined on the Hub in their own files. This
+            option should only be set to `True` for repositories you trust and in which you have read the code, as it
+            will execute code present on the Hub on your local machine.
 
     > [!TIP] > You may pass a token in `token` if you are not logged in (`hf auth login`) and want to use private or
     [gated > models](https://huggingface.co/docs/hub/models-gated#gated-models).
@@ -508,5 +539,6 @@ def get_class_from_dynamic_module(
         revision=revision,
         local_files_only=local_files_only,
         local_dir=local_dir,
+        trust_remote_code=trust_remote_code,
     )
     return get_class_in_module(class_name, final_module)

@@ -99,6 +99,7 @@ def test_from_config_with_dict_diffusers_class(self, mock_get_class):
             importable_classes=unittest.mock.ANY,
             pipelines=None,
             is_pipeline_module=False,
+            trust_remote_code=False,
         )
         mock_get_class.return_value[0].from_config.assert_called_once_with(config)
         assert result is mock_model
@@ -139,6 +140,7 @@ def test_from_config_with_model_type_routes_to_transformers(self, mock_get_class
             importable_classes=unittest.mock.ANY,
             pipelines=None,
             is_pipeline_module=False,
+            trust_remote_code=False,
         )
         assert result is mock_model
 

@@ -1029,14 +1029,40 @@ def test_get_pipeline_class_from_flax(self):
 
 class CustomPipelineTests(unittest.TestCase):
     def test_load_custom_pipeline(self):
+        with self.assertRaises(ValueError) as cm:
+            pipeline = DiffusionPipeline.from_pretrained(
+                "google/ddpm-cifar10-32", custom_pipeline="hf-internal-testing/diffusers-dummy-pipeline"
+            )
+        self.assertIn(
+            "Pass `trust_remote_code=True` to allow loading remote code modules.",
+            str(cm.exception),
+        )
+
         pipeline = DiffusionPipeline.from_pretrained(
-            "google/ddpm-cifar10-32", custom_pipeline="hf-internal-testing/diffusers-dummy-pipeline"
+            "google/ddpm-cifar10-32",
+            custom_pipeline="hf-internal-testing/diffusers-dummy-pipeline",
+            trust_remote_code=True,
         )
         pipeline = pipeline.to(torch_device)
         # NOTE that `"CustomPipeline"` is not a class that is defined in this library, but solely on the Hub
         # under https://huggingface.co/hf-internal-testing/diffusers-dummy-pipeline/blob/main/pipeline.py#L24
         assert pipeline.__class__.__name__ == "CustomPipeline"
 
+    def test_global_disable_remote_code(self):
+        with (
+            mock.patch("diffusers.utils.dynamic_modules_utils.DIFFUSERS_DISABLE_REMOTE_CODE", True),
+            self.assertRaises(ValueError) as cm,
+        ):
+            DiffusionPipeline.from_pretrained(
+                "google/ddpm-cifar10-32",
+                custom_pipeline="one_step_unet",
+                custom_revision="main",
+            )
+        self.assertIn(
+            "Downloading remote code is disabled globally via the DIFFUSERS_DISABLE_REMOTE_CODE environment variable.",
+            str(cm.exception),
+        )
+
     def test_load_custom_github(self):
         pipeline = DiffusionPipeline.from_pretrained(
             "google/ddpm-cifar10-32", custom_pipeline="one_step_unet", custom_revision="main"
@@ -1063,8 +1089,19 @@ def test_load_custom_github(self):
         assert pipeline.__class__.__name__ == "UnetSchedulerOneForwardPipeline"
 
     def test_run_custom_pipeline(self):
+        with self.assertRaises(ValueError) as cm:
+            pipeline = DiffusionPipeline.from_pretrained(
+                "google/ddpm-cifar10-32", custom_pipeline="hf-internal-testing/diffusers-dummy-pipeline"
+            )
+        self.assertIn(
+            "Pass `trust_remote_code=True` to allow loading remote code modules.",
+            str(cm.exception),
+        )
+
         pipeline = DiffusionPipeline.from_pretrained(
-            "google/ddpm-cifar10-32", custom_pipeline="hf-internal-testing/diffusers-dummy-pipeline"
+            "google/ddpm-cifar10-32",
+            custom_pipeline="hf-internal-testing/diffusers-dummy-pipeline",
+            trust_remote_code=True,
         )
         pipeline = pipeline.to(torch_device)
         images, output_str = pipeline(num_inference_steps=2, output_type="np")
@@ -1076,8 +1113,12 @@ def test_run_custom_pipeline(self):
 
     def test_remote_components(self):
         # make sure that trust remote code has to be passed
-        with self.assertRaises(ValueError):
+        with self.assertRaises(ValueError) as cm:
             pipeline = DiffusionPipeline.from_pretrained("hf-internal-testing/tiny-sdxl-custom-components")
+        self.assertIn(
+            "Pass `trust_remote_code=True` to allow loading remote code modules.",
+            str(cm.exception),
+        )
 
         # Check that only loading custom components "my_unet", "my_scheduler" works
         pipeline = DiffusionPipeline.from_pretrained(
@@ -1107,10 +1148,49 @@ def test_remote_components(self):
 
         assert images.shape == (1, 64, 64, 3)
 
+    def test_custom_components_from_local_dir(self):
+        with tempfile.TemporaryDirectory() as tmpdirname:
+            path = snapshot_download("hf-internal-testing/tiny-sdxl-custom-components", cache_dir=tmpdirname)
+            # make sure that trust remote code has to be passed
+            with self.assertRaises(ValueError) as cm:
+                pipeline = DiffusionPipeline.from_pretrained(path)
+            self.assertIn(
+                "Pass `trust_remote_code=True` to allow loading remote code modules.",
+                str(cm.exception),
+            )
+
+            # Check that only loading custom components "my_unet", "my_scheduler" works
+            pipeline = DiffusionPipeline.from_pretrained(path, trust_remote_code=True)
+
+            assert pipeline.config.unet == ("diffusers_modules.local.my_unet_model", "MyUNetModel")
+            assert pipeline.config.scheduler == ("diffusers_modules.local.my_scheduler", "MyScheduler")
+            assert pipeline.__class__.__name__ == "StableDiffusionXLPipeline"
+
+            pipeline = pipeline.to(torch_device)
+            images = pipeline("test", num_inference_steps=2, output_type="np")[0]
+
+            assert images.shape == (1, 64, 64, 3)
+
+            # Check that only loading custom components "my_unet", "my_scheduler" and explicit custom pipeline works
+            pipeline = DiffusionPipeline.from_pretrained(path, custom_pipeline="my_pipeline", trust_remote_code=True)
+
+            assert pipeline.config.unet == ("diffusers_modules.local.my_unet_model", "MyUNetModel")
+            assert pipeline.config.scheduler == ("diffusers_modules.local.my_scheduler", "MyScheduler")
+            assert pipeline.__class__.__name__ == "MyPipeline"
+
+            pipeline = pipeline.to(torch_device)
+            images = pipeline("test", num_inference_steps=2, output_type="np")[0]
+
+            assert images.shape == (1, 64, 64, 3)
+
     def test_remote_auto_custom_pipe(self):
         # make sure that trust remote code has to be passed
-        with self.assertRaises(ValueError):
+        with self.assertRaises(ValueError) as cm:
             pipeline = DiffusionPipeline.from_pretrained("hf-internal-testing/tiny-sdxl-custom-all")
+        self.assertIn(
+            "Pass `trust_remote_code=True` to allow loading remote code modules.",
+            str(cm.exception),
+        )
 
         # Check that only loading custom components "my_unet", "my_scheduler" and auto custom pipeline works
         pipeline = DiffusionPipeline.from_pretrained(
@@ -1128,8 +1208,12 @@ def test_remote_auto_custom_pipe(self):
 
     def test_remote_custom_pipe_with_dot_in_name(self):
         # make sure that trust remote code has to be passed
-        with self.assertRaises(ValueError):
+        with self.assertRaises(ValueError) as cm:
             pipeline = DiffusionPipeline.from_pretrained("akasharidas/ddpm-cifar10-32-dot.in.name")
+        self.assertIn(
+            "Pass `trust_remote_code=True` to allow loading remote code modules.",
+            str(cm.exception),
+        )
 
         pipeline = DiffusionPipeline.from_pretrained("akasharidas/ddpm-cifar10-32-dot.in.name", trust_remote_code=True)
 
@@ -1143,8 +1227,17 @@ def test_remote_custom_pipe_with_dot_in_name(self):
 
     def test_local_custom_pipeline_repo(self):
         local_custom_pipeline_path = get_tests_dir("fixtures/custom_pipeline")
+        with self.assertRaises(ValueError) as cm:
+            pipeline = DiffusionPipeline.from_pretrained(
+                "google/ddpm-cifar10-32", custom_pipeline=local_custom_pipeline_path
+            )
+        self.assertIn(
+            "Pass `trust_remote_code=True` to allow loading remote code modules.",
+            str(cm.exception),
+        )
+
         pipeline = DiffusionPipeline.from_pretrained(
-            "google/ddpm-cifar10-32", custom_pipeline=local_custom_pipeline_path
+            "google/ddpm-cifar10-32", custom_pipeline=local_custom_pipeline_path, trust_remote_code=True
         )
         pipeline = pipeline.to(torch_device)
         images, output_str = pipeline(num_inference_steps=2, output_type="np")
@@ -1157,8 +1250,19 @@ def test_local_custom_pipeline_repo(self):
     def test_local_custom_pipeline_file(self):
         local_custom_pipeline_path = get_tests_dir("fixtures/custom_pipeline")
         local_custom_pipeline_path = os.path.join(local_custom_pipeline_path, "what_ever.py")
+        with self.assertRaises(ValueError) as cm:
+            pipeline = DiffusionPipeline.from_pretrained(
+                "google/ddpm-cifar10-32", custom_pipeline=local_custom_pipeline_path
+            )
+        self.assertIn(
+            "Pass `trust_remote_code=True` to allow loading remote code modules.",
+            str(cm.exception),
+        )
+
         pipeline = DiffusionPipeline.from_pretrained(
-            "google/ddpm-cifar10-32", custom_pipeline=local_custom_pipeline_path
+            "google/ddpm-cifar10-32",
+            custom_pipeline=local_custom_pipeline_path,
+            trust_remote_code=True,
         )
         pipeline = pipeline.to(torch_device)
         images, output_str = pipeline(num_inference_steps=2, output_type="np")