fix(chart): keep query-context updates bound to the chart's datasource

On the query-context-only update path UpdateChartCommand intentionally
skips the ownership check so report and alert workers can refresh a
chart's cached payload. Validate that the submitted query context still
targets the chart's own datasource (id and type) before saving, so a
cached payload cannot be repointed at an unrelated datasource. Payloads
without a parseable datasource fall back to the chart's datasource at
execution time and are left unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

superset/commands/chart/exceptions.py

@@ -103,6 +103,19 @@ class DatasourceTypeUpdateRequiredValidationError(ValidationError):
         )
 
 
+class ChartQueryContextDatasourceMismatchValidationError(ValidationError):
+    """
+    Raised when a query-context-only update carries a datasource that does not
+    match the chart's own datasource.
+    """
+
+    def __init__(self) -> None:
+        super().__init__(
+            _("The query context datasource does not match the chart datasource"),
+            field_name="query_context",
+        )
+
+
 class ChartNotFoundError(CommandException):
     message = "Chart not found."
 

superset/commands/chart/update.py

@@ -29,6 +29,7 @@ from superset.commands.chart.exceptions import (
     ChartForbiddenError,
     ChartInvalidError,
     ChartNotFoundError,
+    ChartQueryContextDatasourceMismatchValidationError,
     ChartUpdateFailedError,
     DashboardsForbiddenError,
     DashboardsNotFoundValidationError,
@@ -41,6 +42,7 @@ from superset.exceptions import SupersetSecurityException
 from superset.models.dashboard import Dashboard
 from superset.models.slice import Slice
 from superset.tags.models import ObjectType
+from superset.utils import json
 from superset.utils.decorators import on_error, transaction
 
 logger = logging.getLogger(__name__)
@@ -101,6 +103,51 @@ class UpdateChartCommand(UpdateMixin, BaseCommand):
                 if not security_manager.is_owner(dash):
                     raise DashboardsForbiddenError()
 
+    def _validate_query_context_datasource(
+        self, exceptions: list[ValidationError]
+    ) -> None:
+        """
+        Ensure a query-context-only update keeps the chart's own datasource.
+
+        The submitted query context is only verified when it carries a parseable
+        ``datasource`` object; a payload that references a different datasource than
+        the chart's persisted one is rejected. Payloads without a datasource fall
+        back to the chart's datasource at execution time and need no check.
+        """
+        if not self._model:
+            return
+
+        raw_query_context = self._properties.get("query_context")
+        if not raw_query_context:
+            return
+
+        try:
+            query_context = json.loads(raw_query_context)
+        except (TypeError, ValueError):
+            # An unparseable payload cannot be verified or replayed; leave it for
+            # downstream handling rather than guessing at its intent.
+            return
+
+        datasource = (
+            query_context.get("datasource") if isinstance(query_context, dict) else None
+        )
+        if not isinstance(datasource, dict):
+            return
+
+        try:
+            ids_match = int(datasource["id"]) == self._model.datasource_id
+        except (KeyError, TypeError, ValueError):
+            ids_match = False
+
+        datasource_type = datasource.get("type")
+        types_match = (
+            datasource_type is None
+            or str(datasource_type) == self._model.datasource_type
+        )
+
+        if not ids_match or not types_match:
+            exceptions.append(ChartQueryContextDatasourceMismatchValidationError())
+
     def validate(self) -> None:  # noqa: C901
         exceptions: list[ValidationError] = []
         dashboard_ids = self._properties.get("dashboards")
@@ -134,6 +181,12 @@ class UpdateChartCommand(UpdateMixin, BaseCommand):
                 raise ChartForbiddenError() from ex
             except ValidationError as ex:
                 exceptions.append(ex)
+        else:
+            # The query-context-only path skips the ownership check so report and
+            # alert workers can refresh a chart's cached payload. Keep that payload
+            # bound to the chart's own datasource so it cannot be repointed at an
+            # unrelated one.
+            self._validate_query_context_datasource(exceptions)
 
         # validate tags
         try:

tests/unit_tests/commands/chart/update_test.py

@@ -17,10 +17,11 @@
 import pytest
 from pytest_mock import MockerFixture
 
-from superset.commands.chart.exceptions import ChartForbiddenError
+from superset.commands.chart.exceptions import ChartForbiddenError, ChartInvalidError
 from superset.commands.chart.update import UpdateChartCommand
 from superset.errors import ErrorLevel, SupersetError, SupersetErrorType
 from superset.exceptions import SupersetSecurityException
+from superset.utils import json
 
 
 def _ownership_exc() -> SupersetSecurityException:
@@ -91,3 +92,73 @@ def test_update_chart_owner_can_perform_regular_update(
 
     find_by_id.assert_called_once_with(1)
     raise_for_ownership.assert_called_once()
+
+
+def _query_context_payload(datasource: object) -> dict[str, object]:
+    return {
+        "query_context": json.dumps({"datasource": datasource, "queries": []}),
+        "query_context_generation": True,
+    }
+
+
+def test_update_chart_query_context_matching_datasource_is_allowed(
+    mocker: MockerFixture,
+) -> None:
+    """A query context that targets the chart's own datasource is accepted."""
+    find_by_id = mocker.patch("superset.commands.chart.update.ChartDAO.find_by_id")
+    find_by_id.return_value = mocker.MagicMock(
+        id=1, tags=[], dashboards=[], datasource_id=42, datasource_type="table"
+    )
+    mocker.patch("superset.commands.chart.update.security_manager.raise_for_ownership")
+
+    UpdateChartCommand(
+        1, _query_context_payload({"id": 42, "type": "table"})
+    ).validate()
+
+
+@pytest.mark.parametrize(
+    "datasource",
+    [
+        {"id": 99, "type": "table"},  # different id
+        {"id": 42, "type": "query"},  # different type
+        {"id": "99", "type": "table"},  # different id as string
+    ],
+)
+def test_update_chart_query_context_mismatched_datasource_is_rejected(
+    mocker: MockerFixture,
+    datasource: dict[str, object],
+) -> None:
+    """A query context pointing at a different datasource is rejected with a 4xx."""
+    find_by_id = mocker.patch("superset.commands.chart.update.ChartDAO.find_by_id")
+    find_by_id.return_value = mocker.MagicMock(
+        id=1, tags=[], dashboards=[], datasource_id=42, datasource_type="table"
+    )
+    mocker.patch("superset.commands.chart.update.security_manager.raise_for_ownership")
+
+    with pytest.raises(ChartInvalidError):
+        UpdateChartCommand(1, _query_context_payload(datasource)).validate()
+
+
+@pytest.mark.parametrize(
+    "query_context",
+    [
+        "{}",  # no datasource key
+        '{"datasource": null}',  # null datasource
+        "not-json",  # unparseable payload
+    ],
+)
+def test_update_chart_query_context_without_datasource_is_allowed(
+    mocker: MockerFixture,
+    query_context: str,
+) -> None:
+    """Payloads with no verifiable datasource fall back to the chart's own."""
+    find_by_id = mocker.patch("superset.commands.chart.update.ChartDAO.find_by_id")
+    find_by_id.return_value = mocker.MagicMock(
+        id=1, tags=[], dashboards=[], datasource_id=42, datasource_type="table"
+    )
+    mocker.patch("superset.commands.chart.update.security_manager.raise_for_ownership")
+
+    UpdateChartCommand(
+        1,
+        {"query_context": query_context, "query_context_generation": True},
+    ).validate()