diff --git a/src/middlewared/middlewared/api/v25_04_0/core.py b/src/middlewared/middlewared/api/v25_04_0/core.py
index 6db1e6ee94c63..79f3fda0a040d 100644
--- a/src/middlewared/middlewared/api/v25_04_0/core.py
+++ b/src/middlewared/middlewared/api/v25_04_0/core.py
@@ -30,6 +30,7 @@ class CoreSetOptionsOptions(BaseModel, metaclass=ForUpdateMetaclass):
         strict=True,
         str_max_length=1024,
         use_attribute_docstrings=True,
+        extra="ignore",
     )
 
     private_methods: bool
diff --git a/src/middlewared/middlewared/api/v25_10_0/core.py b/src/middlewared/middlewared/api/v25_10_0/core.py
index 2d37b03ff8920..79f3fda0a040d 100644
--- a/src/middlewared/middlewared/api/v25_10_0/core.py
+++ b/src/middlewared/middlewared/api/v25_10_0/core.py
@@ -1,5 +1,7 @@
 from typing import Literal
 
+from pydantic import ConfigDict
+
 from middlewared.api.base import BaseModel, ForUpdateMetaclass, single_argument_result
 
 __all__ = [
@@ -23,6 +25,14 @@ class CorePingResult(BaseModel):
 
 
 class CoreSetOptionsOptions(BaseModel, metaclass=ForUpdateMetaclass):
+    # We can't use `extra="forbid"` here because newer version clients might try to set more options than we support
+    model_config = ConfigDict(
+        strict=True,
+        str_max_length=1024,
+        use_attribute_docstrings=True,
+        extra="ignore",
+    )
+
     private_methods: bool
     py_exceptions: bool