diff --git a/api/configs/feature/__init__.py b/api/configs/feature/__init__.py
index 3fe9031dff..d37cff63e9 100644
--- a/api/configs/feature/__init__.py
+++ b/api/configs/feature/__init__.py
@@ -265,6 +265,11 @@ class PluginConfig(BaseSettings):
         default=60 * 60,
     )
 
+    PLUGIN_MAX_FILE_SIZE: PositiveInt = Field(
+        description="Maximum allowed size (bytes) for plugin-generated files",
+        default=50 * 1024 * 1024,
+    )
+
 
 class MarketplaceConfig(BaseSettings):
     """
diff --git a/api/core/plugin/impl/tool.py b/api/core/plugin/impl/tool.py
index 6fa5136b42..cc38ecfce2 100644
--- a/api/core/plugin/impl/tool.py
+++ b/api/core/plugin/impl/tool.py
@@ -3,6 +3,8 @@ from typing import Any
 
 from pydantic import BaseModel
 
+from configs import dify_config
+
 # from core.plugin.entities.plugin import GenericProviderID, ToolProviderID
 from core.plugin.entities.plugin_daemon import CredentialType, PluginBasicBooleanResponse, PluginToolProviderEntity
 from core.plugin.impl.base import BasePluginClient
@@ -122,7 +124,7 @@ class PluginToolManager(BasePluginClient):
             },
         )
 
-        return merge_blob_chunks(response)
+        return merge_blob_chunks(response, max_file_size=dify_config.PLUGIN_MAX_FILE_SIZE)
 
     def validate_provider_credentials(
         self, tenant_id: str, user_id: str, provider: str, credentials: dict[str, Any]
diff --git a/api/pyproject.toml b/api/pyproject.toml
index a3ea683bda..530b0c0da3 100644
--- a/api/pyproject.toml
+++ b/api/pyproject.toml
@@ -67,7 +67,7 @@ dependencies = [
     "pycryptodome==3.23.0",
     "pydantic~=2.11.4",
     "pydantic-extra-types~=2.10.3",
-    "pydantic-settings~=2.11.0",
+    "pydantic-settings~=2.12.0",
     "pyjwt~=2.10.1",
     "pypdfium2==5.2.0",
     "python-docx~=1.1.0",
diff --git a/api/uv.lock b/api/uv.lock
index 03622e0ce6..afad10dc94 100644
--- a/api/uv.lock
+++ b/api/uv.lock
@@ -1635,7 +1635,7 @@ requires-dist = [
     { name = "pycryptodome", specifier = "==3.23.0" },
     { name = "pydantic", specifier = "~=2.11.4" },
     { name = "pydantic-extra-types", specifier = "~=2.10.3" },
-    { name = "pydantic-settings", specifier = "~=2.11.0" },
+    { name = "pydantic-settings", specifier = "~=2.12.0" },
     { name = "pyjwt", specifier = "~=2.10.1" },
     { name = "pypdfium2", specifier = "==5.2.0" },
     { name = "python-docx", specifier = "~=1.1.0" },
@@ -4900,16 +4900,16 @@ wheels = [
 
 [[package]]
 name = "pydantic-settings"
-version = "2.11.0"
+version = "2.12.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "pydantic" },
     { name = "python-dotenv" },
     { name = "typing-inspection" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/20/c5/dbbc27b814c71676593d1c3f718e6cd7d4f00652cefa24b75f7aa3efb25e/pydantic_settings-2.11.0.tar.gz", hash = "sha256:d0e87a1c7d33593beb7194adb8470fc426e95ba02af83a0f23474a04c9a08180", size = 188394, upload-time = "2025-09-24T14:19:11.764Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/43/4b/ac7e0aae12027748076d72a8764ff1c9d82ca75a7a52622e67ed3f765c54/pydantic_settings-2.12.0.tar.gz", hash = "sha256:005538ef951e3c2a68e1c08b292b5f2e71490def8589d4221b95dab00dafcfd0", size = 194184, upload-time = "2025-11-10T14:25:47.013Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/83/d6/887a1ff844e64aa823fb4905978d882a633cfe295c32eacad582b78a7d8b/pydantic_settings-2.11.0-py3-none-any.whl", hash = "sha256:fe2cea3413b9530d10f3a5875adffb17ada5c1e1bab0b2885546d7310415207c", size = 48608, upload-time = "2025-09-24T14:19:10.015Z" },
+    { url = "https://files.pythonhosted.org/packages/c1/60/5d4751ba3f4a40a6891f24eec885f51afd78d208498268c734e256fb13c4/pydantic_settings-2.12.0-py3-none-any.whl", hash = "sha256:fddb9fd99a5b18da837b29710391e945b1e30c135477f484084ee513adb93809", size = 51880, upload-time = "2025-11-10T14:25:45.546Z" },
 ]
 
 [[package]]