From ecd63e315ac05f2edb101b5144652fa224f73d04 Mon Sep 17 00:00:00 2001
From: Yujong Lee <yujong@berri.ai>
Date: Tue, 1 Sep 2026 14:09:45 -0700
Subject: [PATCH] fix(vector-stores): trust config-defined Milvus gRPC

---
 litellm/proxy/vector_store_endpoints/utils.py |  6 ++--
 litellm/types/vector_stores.py                |  4 ++-
 .../vector_stores/vector_store_registry.py    |  4 +++
 .../test_vector_store_endpoints.py            | 30 +++++++++++++++++++
 4 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/litellm/proxy/vector_store_endpoints/utils.py b/litellm/proxy/vector_store_endpoints/utils.py
index 997c6bae49c..9f527aec467 100644
--- a/litellm/proxy/vector_store_endpoints/utils.py
+++ b/litellm/proxy/vector_store_endpoints/utils.py
@@ -18,10 +18,12 @@ from litellm.proxy._types import (
     UserAPIKeyAuth,
 )
 from litellm.types.utils import LlmProviders
-from litellm.types.vector_stores import LiteLLM_ManagedVectorStore
+from litellm.types.vector_stores import (
+    MILVUS_ADMIN_CONFIGURED_CONNECTION,
+    LiteLLM_ManagedVectorStore,
+)
 from litellm.utils import ProviderConfigManager
 
-MILVUS_ADMIN_CONFIGURED_CONNECTION: Final = "_litellm_admin_configured_milvus_grpc"
 MILVUS_GRPC_CONNECTION_FIELDS: Final = frozenset(
     {
         "api_base",
diff --git a/litellm/types/vector_stores.py b/litellm/types/vector_stores.py
index 474c652ff3a..8c2101d91d7 100644
--- a/litellm/types/vector_stores.py
+++ b/litellm/types/vector_stores.py
@@ -1,11 +1,13 @@
 from dataclasses import dataclass
 from datetime import datetime
 from enum import Enum
-from typing import Any, Literal
+from typing import Any, Final, Literal
 
 from pydantic import BaseModel
 from typing_extensions import TypedDict
 
+MILVUS_ADMIN_CONFIGURED_CONNECTION: Final = "_litellm_admin_configured_milvus_grpc"
+
 
 class SupportedVectorStoreIntegrations(str, Enum):
     """Supported vector store integrations."""
diff --git a/litellm/vector_stores/vector_store_registry.py b/litellm/vector_stores/vector_store_registry.py
index b71d6784873..5580e867001 100644
--- a/litellm/vector_stores/vector_store_registry.py
+++ b/litellm/vector_stores/vector_store_registry.py
@@ -17,6 +17,7 @@ from litellm.repositories.table_repositories import (
     ManagedVectorStoresRepository,
 )
 from litellm.types.vector_stores import (
+    MILVUS_ADMIN_CONFIGURED_CONNECTION,
     VECTOR_STORE_OPENAI_PARAMS,
     LiteLLM_ManagedVectorStore,
     LiteLLM_ManagedVectorStoreIndex,
@@ -418,6 +419,9 @@ class VectorStoreRegistry:
                     f"custom_llm_provider is required for initializing vector store, got custom_llm_provider={custom_llm_provider}"
                 )
 
+            if custom_llm_provider == "milvus" and vector_store_litellm_params.get("milvus_transport") == "grpc":
+                vector_store_litellm_params[MILVUS_ADMIN_CONFIGURED_CONNECTION] = True
+
             litellm_managed_vector_store = LiteLLM_ManagedVectorStore(
                 vector_store_id=vector_store_id,
                 custom_llm_provider=custom_llm_provider,
diff --git a/tests/test_litellm/proxy/vector_store_endpoints/test_vector_store_endpoints.py b/tests/test_litellm/proxy/vector_store_endpoints/test_vector_store_endpoints.py
index a5a74c174b3..04ec48447b7 100644
--- a/tests/test_litellm/proxy/vector_store_endpoints/test_vector_store_endpoints.py
+++ b/tests/test_litellm/proxy/vector_store_endpoints/test_vector_store_endpoints.py
@@ -37,6 +37,7 @@ from litellm.proxy.vector_store_files_endpoints.endpoints import (
 from litellm.types.utils import EmbeddingResponse, LlmProviders
 from litellm.types.vector_stores import IndexCreateRequest, IndexListResponse
 from litellm.vector_stores.main import _direct_vector_store_embedding_executor
+from litellm.vector_stores.vector_store_registry import VectorStoreRegistry
 
 
 def _serialize_litellm_params(litellm_params):
@@ -769,6 +770,35 @@ async def test_unmarked_managed_milvus_connection_requires_admin_resave():
     assert "re-saved" in str(exc_info.value.detail)
 
 
+@pytest.mark.asyncio
+async def test_config_loaded_milvus_grpc_connection_is_trusted():
+    registry = VectorStoreRegistry()
+    registry.load_vector_stores_from_config(
+        [
+            {
+                "vector_store_name": "configured",
+                "litellm_params": {
+                    "vector_store_id": "configured",
+                    "custom_llm_provider": "milvus",
+                    "milvus_transport": "grpc",
+                    "api_base": "https://configured-milvus:19530",
+                    "litellm_embedding_model": "team-embedding-alias",
+                },
+            }
+        ]
+    )
+
+    with patch.object(litellm, "vector_store_registry", registry):
+        result = await _update_request_data_with_litellm_managed_vector_store_registry(
+            data={"query": "allowed"},
+            vector_store_id="configured",
+            user_api_key_dict=UserAPIKeyAuth(user_role=LitellmUserRoles.INTERNAL_USER),
+        )
+
+    assert result["api_base"] == "https://configured-milvus:19530"
+    assert result[MILVUS_ADMIN_CONFIGURED_CONNECTION] is True
+
+
 def test_admin_persistence_strips_forged_marker_and_adds_server_marker():
     params = prepare_milvus_connection_for_persistence(
         custom_llm_provider="milvus/probe",