diff --git a/api/controllers/inner_api/wraps.py b/api/controllers/inner_api/wraps.py
index 7c60b316e8..990f33b647 100644
--- a/api/controllers/inner_api/wraps.py
+++ b/api/controllers/inner_api/wraps.py
@@ -2,6 +2,7 @@ from base64 import b64encode
 from collections.abc import Callable
 from functools import wraps
 from hashlib import sha1
+from hmac import compare_digest
 from hmac import new as hmac_new
 from typing import ParamSpec, TypeVar
 
@@ -22,7 +23,9 @@ def billing_inner_api_only(view: Callable[P, R]):
 
         # get header 'X-Inner-Api-Key'
         inner_api_key = request.headers.get("X-Inner-Api-Key")
-        if not inner_api_key or inner_api_key != dify_config.INNER_API_KEY:
+        if not inner_api_key or not (
+            dify_config.INNER_API_KEY and compare_digest(inner_api_key, dify_config.INNER_API_KEY)
+        ):
             abort(401)
 
         return view(*args, **kwargs)
@@ -38,7 +41,9 @@ def enterprise_inner_api_only(view: Callable[P, R]):
 
         # get header 'X-Inner-Api-Key'
         inner_api_key = request.headers.get("X-Inner-Api-Key")
-        if not inner_api_key or inner_api_key != dify_config.INNER_API_KEY:
+        if not inner_api_key or not (
+            dify_config.INNER_API_KEY and compare_digest(inner_api_key, dify_config.INNER_API_KEY)
+        ):
             abort(401)
 
         return view(*args, **kwargs)
@@ -72,7 +77,7 @@ def enterprise_inner_api_user_auth(view: Callable[P, R]):
         signature = hmac_new(inner_api_key.encode("utf-8"), data_to_sign.encode("utf-8"), sha1)
         signature_base64 = b64encode(signature.digest()).decode("utf-8")
 
-        if signature_base64 != token:
+        if not compare_digest(signature_base64, token):
             return view(*args, **kwargs)
 
         kwargs["user"] = db.session.get(EndUser, user_id)
@@ -90,7 +95,9 @@ def plugin_inner_api_only(view: Callable[P, R]):
 
         # get header 'X-Inner-Api-Key'
         inner_api_key = request.headers.get("X-Inner-Api-Key")
-        if not inner_api_key or inner_api_key != dify_config.INNER_API_KEY_FOR_PLUGIN:
+        if not inner_api_key or not (
+            dify_config.INNER_API_KEY_FOR_PLUGIN and compare_digest(inner_api_key, dify_config.INNER_API_KEY_FOR_PLUGIN)
+        ):
             abort(404)
 
         return view(*args, **kwargs)
diff --git a/api/extensions/ext_login.py b/api/extensions/ext_login.py
index 02e50a90fc..2d46ec60e6 100644
--- a/api/extensions/ext_login.py
+++ b/api/extensions/ext_login.py
@@ -1,3 +1,4 @@
+import hmac
 import json
 
 import flask_login
@@ -32,7 +33,7 @@ def load_user_from_request(request_from_flask_login):
     # Check for admin API key authentication first
     if dify_config.ADMIN_API_KEY_ENABLE and auth_token:
         admin_api_key = dify_config.ADMIN_API_KEY
-        if admin_api_key and admin_api_key == auth_token:
+        if admin_api_key and hmac.compare_digest(admin_api_key, auth_token):
             workspace_id = request.headers.get("X-WORKSPACE-ID")
             if workspace_id:
                 tenant_account_join = db.session.execute(
diff --git a/api/libs/token.py b/api/libs/token.py
index a34db70764..777df2dbd7 100644
--- a/api/libs/token.py
+++ b/api/libs/token.py
@@ -1,3 +1,4 @@
+import hmac
 import logging
 import re
 from datetime import UTC, datetime, timedelta
@@ -191,7 +192,7 @@ def check_csrf_token(request: Request, user_id: str):
     # since these APIs are post, they are already protected by SameSite: Lax, so csrf is not required.
     if dify_config.ADMIN_API_KEY_ENABLE:
         auth_token = extract_access_token(request)
-        if auth_token and auth_token == dify_config.ADMIN_API_KEY:
+        if auth_token and dify_config.ADMIN_API_KEY and hmac.compare_digest(auth_token, dify_config.ADMIN_API_KEY):
             return
 
     def _unauthorized():