diff --git a/backend/open_webui/config.py b/backend/open_webui/config.py
index 06178d385c..66d3dd6d51 100644
--- a/backend/open_webui/config.py
+++ b/backend/open_webui/config.py
@@ -37,6 +37,7 @@ from open_webui.env import (
     log,
 )
 from open_webui.internal.db import Base, get_db, get_async_db
+from open_webui.utils.env_vars import get_env_with_aliases
 from open_webui.utils.redis import get_redis_connection
 
 
@@ -624,15 +625,19 @@ FEISHU_CLIENT_SECRET = PersistentConfig(
 )
 
 FEISHU_OAUTH_SCOPE = PersistentConfig(
-    'FEISHU_OAUTH_SCOPE',
+    'FEISHU_CLIENT_SCOPE',
     'oauth.feishu.scope',
-    os.environ.get('FEISHU_OAUTH_SCOPE', 'contact:user.base:readonly'),
+    get_env_with_aliases(
+        'FEISHU_CLIENT_SCOPE',
+        'FEISHU_OAUTH_SCOPE',
+        default='contact:user.base:readonly',
+    ),
 )
 
 FEISHU_REDIRECT_URI = PersistentConfig(
-    'FEISHU_REDIRECT_URI',
+    'FEISHU_CLIENT_REDIRECT_URI',
     'oauth.feishu.redirect_uri',
-    os.environ.get('FEISHU_REDIRECT_URI', ''),
+    get_env_with_aliases('FEISHU_CLIENT_REDIRECT_URI', 'FEISHU_REDIRECT_URI'),
 )
 
 ENABLE_OAUTH_ROLE_MANAGEMENT = PersistentConfig(
diff --git a/backend/open_webui/test/utils/test_env_vars.py b/backend/open_webui/test/utils/test_env_vars.py
new file mode 100644
index 0000000000..eb118954e1
--- /dev/null
+++ b/backend/open_webui/test/utils/test_env_vars.py
@@ -0,0 +1,43 @@
+from open_webui.utils.env_vars import get_env_with_aliases
+
+
+def test_get_env_with_aliases_prefers_documented_env_name():
+    environ = {
+        'FEISHU_CLIENT_REDIRECT_URI': 'https://example.test/oauth/feishu/callback',
+        'FEISHU_REDIRECT_URI': 'https://legacy.example.test/oauth/feishu/callback',
+    }
+
+    assert (
+        get_env_with_aliases(
+            'FEISHU_CLIENT_REDIRECT_URI',
+            'FEISHU_REDIRECT_URI',
+            environ=environ,
+        )
+        == 'https://example.test/oauth/feishu/callback'
+    )
+
+
+def test_get_env_with_aliases_falls_back_to_legacy_alias():
+    environ = {'FEISHU_OAUTH_SCOPE': 'contact:user.email:readonly'}
+
+    assert (
+        get_env_with_aliases(
+            'FEISHU_CLIENT_SCOPE',
+            'FEISHU_OAUTH_SCOPE',
+            default='contact:user.base:readonly',
+            environ=environ,
+        )
+        == 'contact:user.email:readonly'
+    )
+
+
+def test_get_env_with_aliases_returns_default_when_missing():
+    assert (
+        get_env_with_aliases(
+            'FEISHU_CLIENT_SCOPE',
+            'FEISHU_OAUTH_SCOPE',
+            default='contact:user.base:readonly',
+            environ={},
+        )
+        == 'contact:user.base:readonly'
+    )
diff --git a/backend/open_webui/utils/env_vars.py b/backend/open_webui/utils/env_vars.py
new file mode 100644
index 0000000000..6b3d1a3ac0
--- /dev/null
+++ b/backend/open_webui/utils/env_vars.py
@@ -0,0 +1,18 @@
+import os
+from collections.abc import Mapping
+
+
+def get_env_with_aliases(
+    env_name: str,
+    *aliases: str,
+    default: str = '',
+    environ: Mapping[str, str] | None = None,
+) -> str:
+    values = os.environ if environ is None else environ
+
+    for name in (env_name, *aliases):
+        value = values.get(name)
+        if value is not None:
+            return value
+
+    return default