From 79ffcb94f1f5bc8b406ec4592dfa826c6606827d Mon Sep 17 00:00:00 2001
From: XAVIER ALMENDROS <xavier.almendros@ailylabs.com>
Date: Sat, 3 Oct 2026 12:29:25 +0200
Subject: [PATCH] fix(alerting): validate configuration without untyped keyword
 expansion

---
 .../SlackAlerting/slack_alerting.py           |  4 +--
 litellm/types/integrations/slack_alerting.py  |  2 +-
 .../SlackAlerting/test_slack_alerting.py      | 27 +++++++++++++++++++
 3 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/litellm/integrations/SlackAlerting/slack_alerting.py b/litellm/integrations/SlackAlerting/slack_alerting.py
index b778fa2622c..60805d48ec4 100644
--- a/litellm/integrations/SlackAlerting/slack_alerting.py
+++ b/litellm/integrations/SlackAlerting/slack_alerting.py
@@ -115,7 +115,7 @@ class SlackAlerting(CustomBatchLogger):
         )
         self.alert_to_webhook_url = process_slack_alerting_variables(alert_to_webhook_url=alert_to_webhook_url)
         self.is_running = False
-        self.alerting_args = SlackAlertingArgs(**alerting_args)
+        self.alerting_args = SlackAlertingArgs.model_validate(alerting_args)
         self.default_webhook_url = default_webhook_url
         self.flush_lock = asyncio.Lock()
         self.periodic_started = False
@@ -155,7 +155,7 @@ class SlackAlerting(CustomBatchLogger):
         if alert_types is not None:
             self.alert_types = alert_types
         if alerting_args is not None:
-            self.alerting_args = SlackAlertingArgs(**alerting_args)
+            self.alerting_args = SlackAlertingArgs.model_validate(alerting_args)
             self._ensure_periodic_flush_task()
         if alert_type_config is not None:
             for key, val in alert_type_config.items():
diff --git a/litellm/types/integrations/slack_alerting.py b/litellm/types/integrations/slack_alerting.py
index 6a0fb758e41..66d0bb7f799 100644
--- a/litellm/types/integrations/slack_alerting.py
+++ b/litellm/types/integrations/slack_alerting.py
@@ -3,7 +3,7 @@ import time
 from collections.abc import Mapping
 from datetime import datetime as dt
 from enum import Enum
-from typing import Annotated, Any, Final, Literal, Optional, Union
+from typing import Annotated, Final
 
 from pydantic import BaseModel, Field
 from typing_extensions import NotRequired, ReadOnly, TypedDict
diff --git a/tests/unit/integrations/SlackAlerting/test_slack_alerting.py b/tests/unit/integrations/SlackAlerting/test_slack_alerting.py
index 6d1c1b6a551..28866d7c182 100644
--- a/tests/unit/integrations/SlackAlerting/test_slack_alerting.py
+++ b/tests/unit/integrations/SlackAlerting/test_slack_alerting.py
@@ -822,6 +822,33 @@ def test_slack_budget_key_alias_patterns_reject_invalid_config(patterns: object)
         SlackAlertingArgs.model_validate({"slack_budget_alert_key_aliases": patterns})
 
 
+@pytest.mark.asyncio
+@pytest.mark.parametrize("patterns, delivered", (([], False), (["github-example-*"], True)))
+async def test_slack_budget_key_alias_filter_reload_validates_and_changes_delivery(
+    patterns: list[str], delivered: bool
+) -> None:
+    http_handler: Final = _webhook_accepting_posts()
+    slack_alerting: Final = SlackAlerting(
+        alerting=["slack"],
+        default_webhook_url=SLACK_WEBHOOK_URL,
+        async_http_handler=http_handler,
+    )
+    slack_alerting.update_values(alerting_args={"slack_budget_alert_key_aliases": patterns})
+    with pytest.raises(ValidationError, match="slack_budget_alert_key_aliases"):
+        slack_alerting.update_values(alerting_args={"slack_budget_alert_key_aliases": "github-example-*"})
+    await slack_alerting.send_alert(
+        message=THRESHOLD_ALERT,
+        level="High",
+        alert_type=AlertType.budget_alerts,
+        alerting_metadata={},
+        user_info=_budget_webhook_event("github-example-api"),
+    )
+    await slack_alerting.flush_queue()
+    assert http_handler.post.await_count == int(delivered)
+    if delivered:
+        assert THRESHOLD_ALERT in _posted_slack_bodies(http_handler)[0]["text"]
+
+
 def _periodic_flush_tasks() -> list[asyncio.Task[object]]:
     return [
         t