diff --git a/task-sdk/src/airflow/sdk/execution_time/comms.py b/task-sdk/src/airflow/sdk/execution_time/comms.py
index d0f0eae04c88c..41fb1d99da0d8 100644
--- a/task-sdk/src/airflow/sdk/execution_time/comms.py
+++ b/task-sdk/src/airflow/sdk/execution_time/comms.py
@@ -49,7 +49,7 @@
 from __future__ import annotations
 
 import itertools
-from collections.abc import Iterable, Iterator
+from collections.abc import Iterator
 from datetime import datetime
 from functools import cached_property
 from pathlib import Path
@@ -863,8 +863,9 @@ class MaskSecret(BaseModel):
 
     # This is needed since calls to `mask_secret` in the Task process will otherwise only add the mask value
     # to the child process, but the redaction happens in the parent.
-
-    value: str | dict | Iterable
+    # We cannot use `string | Iterable | dict here` (would be more intuitive) because bug in Pydantic
+    # https://github.com/pydantic/pydantic/issues/9541 turns iterable into a ValidatorIterator
+    value: JsonValue
     name: str | None = None
     type: Literal["MaskSecret"] = "MaskSecret"
 
diff --git a/task-sdk/src/airflow/sdk/execution_time/secrets_masker.py b/task-sdk/src/airflow/sdk/execution_time/secrets_masker.py
index 9d75c097bd22a..391bf49701246 100644
--- a/task-sdk/src/airflow/sdk/execution_time/secrets_masker.py
+++ b/task-sdk/src/airflow/sdk/execution_time/secrets_masker.py
@@ -37,6 +37,10 @@
     overload,
 )
 
+# We have to import this here, as it is used in the type annotations at runtime even if it seems it is
+# not used in the code. This is because Pydantic uses type at runtime to validate the types of the fields.
+from pydantic import JsonValue  # noqa: TC002
+
 from airflow import settings
 
 if TYPE_CHECKING:
@@ -105,7 +109,7 @@ def should_hide_value_for_key(name):
     return False
 
 
-def mask_secret(secret: str | dict | Iterable, name: str | None = None) -> None:
+def mask_secret(secret: JsonValue, name: str | None = None) -> None:
     """
     Mask a secret from appearing in the logs.
 
@@ -475,7 +479,7 @@ def _adaptations(self, secret: str) -> Generator[str, None, None]:
             else:
                 yield secret_or_secrets
 
-    def add_mask(self, secret: str | dict | Iterable, name: str | None = None):
+    def add_mask(self, secret: JsonValue, name: str | None = None):
         """Add a new secret to be masked to this filter instance."""
         if isinstance(secret, dict):
             for k, v in secret.items():
diff --git a/task-sdk/tests/task_sdk/definitions/test_secrets_masker.py b/task-sdk/tests/task_sdk/definitions/test_secrets_masker.py
index e9599af4995de..e03266bbf5ff8 100644
--- a/task-sdk/tests/task_sdk/definitions/test_secrets_masker.py
+++ b/task-sdk/tests/task_sdk/definitions/test_secrets_masker.py
@@ -30,6 +30,7 @@
 import pytest
 
 from airflow.models import Connection
+from airflow.sdk.execution_time.comms import MaskSecret
 from airflow.sdk.execution_time.secrets_masker import (
     RedactedIO,
     SecretsMasker,
@@ -545,6 +546,36 @@ def test_add_mask_short_secrets_and_skip_keywords(
         if should_be_masked:
             assert filt.replacer is not None
 
+    @pytest.mark.parametrize(
+        "object_to_mask",
+        [
+            {
+                "key_path": "/files/airflow-breeze-config/keys2/keys.json",
+                "scope": "https://www.googleapis.com/auth/cloud-platform",
+                "project": "project_id",
+                "num_retries": 6,
+            },
+            ["iter1", "iter2", {"key": "value"}],
+            "string",
+            {
+                "key1": "value1",
+            },
+        ],
+    )
+    def test_mask_secret_with_objects(self, object_to_mask):
+        mask_secret_object = MaskSecret(value=object_to_mask, name="test_secret")
+        assert mask_secret_object.value == object_to_mask
+
+    def test_mask_secret_with_list(self):
+        example_dict = ["test"]
+        mask_secret_object = MaskSecret(value=example_dict, name="test_secret")
+        assert mask_secret_object.value == example_dict
+
+    def test_mask_secret_with_iterable(self):
+        example_dict = ["test"]
+        mask_secret_object = MaskSecret(value=example_dict, name="test_secret")
+        assert mask_secret_object.value == example_dict
+
 
 class TestStructuredVsUnstructuredMasking:
     def test_structured_sensitive_fields_always_masked(self):