diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6c8947720..f7075b7bfd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,10 @@ You can also check the
 
 - Features
   - add link to https://status.lindas.admin.ch/ in footer 
+- Fixes
+  - Statistics page no longer fails when the database contains malformed chart
+    configs; unsafe cube IRIs are filtered out and SPARQL metadata lookups
+    tolerate endpoint failures
 
 ## 6.5.5 - 2026-10-26
 
diff --git a/app/statistics/iris.ts b/app/statistics/iris.ts
new file mode 100644
index 0000000000..21808abace
--- /dev/null
+++ b/app/statistics/iris.ts
@@ -0,0 +1,13 @@
+const SAFE_IRI = /^https?:\/\/[^ <>"{}|\\^`]+$/;
+
+export const isSafeIri = (iri: string): boolean => {
+  return SAFE_IRI.test(iri);
+};
+
+export const chunk = <T>(items: T[], size: number): T[][] => {
+  return Array.from({ length: Math.ceil(items.length / size) }, (_, i) =>
+    items.slice(i * size, i * size + size)
+  );
+};
+
+export const IRIS_CHUNK_SIZE = 100;
diff --git a/app/statistics/prisma.ts b/app/statistics/prisma.ts
index 9f51009131..3e5f567abc 100644
--- a/app/statistics/prisma.ts
+++ b/app/statistics/prisma.ts
@@ -192,29 +192,37 @@ export const fetchChartsMetadata = async () => {
         jsonb_agg(
           COALESCE(
             data ->> 'dataSet',
-            chart_config_obj ->> 'dataSet',
+            data -> 'chartConfig' ->> 'dataSet',
             cubes_obj ->> 'iri'
           )
         ) AS iris,
         COALESCE(
           jsonb_agg(chart_config_array ->> 'chartType') FILTER (WHERE chart_config_array ->> 'chartType' IS NOT NULL),
-          jsonb_build_array(chart_config_obj ->> 'chartType')
+          jsonb_build_array(data -> 'chartConfig' ->> 'chartType')
         ) AS chart_types,
-        layout -> 'type' AS layout_type,
-        layout -> 'layout' AS layout_subtype
+        data -> 'layout' -> 'type' AS layout_type,
+        data -> 'layout' -> 'layout' AS layout_subtype
       FROM config
-      LEFT JOIN LATERAL jsonb_array_elements(data -> 'chartConfigs') AS chart_config_array ON true
-      LEFT JOIN LATERAL jsonb_array_elements(chart_config_array -> 'cubes') AS cubes_obj ON true
-      LEFT JOIN LATERAL (SELECT data -> 'chartConfig' AS chart_config_obj) AS single_config ON true
-      LEFT JOIN LATERAL (SELECT data -> 'layout' AS layout) AS layout ON true
-      GROUP BY day, data, chart_config_obj, layout, layout_subtype
+      LEFT JOIN LATERAL jsonb_array_elements(
+        CASE
+          WHEN jsonb_typeof(data -> 'chartConfigs') = 'array' THEN data -> 'chartConfigs'
+          ELSE '[]'::jsonb
+        END
+      ) AS chart_config_array ON true
+      LEFT JOIN LATERAL jsonb_array_elements(
+        CASE
+          WHEN jsonb_typeof(chart_config_array -> 'cubes') = 'array' THEN chart_config_array -> 'cubes'
+          ELSE '[]'::jsonb
+        END
+      ) AS cubes_obj ON true
+      GROUP BY config.id, day
     )
     SELECT day, iris, chart_types, layout_type, layout_subtype
     FROM filtered_data
     WHERE NOT EXISTS (
       SELECT 1
       FROM jsonb_array_elements_text(iris) AS iri
-      WHERE NOT (iri LIKE 'http://%' OR iri LIKE 'https://%')
+      WHERE iri IS NULL OR NOT (iri ~ '^https?://[^ <>"{}|\\^]+$')
     );
   `.then((rows) => {
     return rows.map((row) => ({
diff --git a/app/statistics/sparql.ts b/app/statistics/sparql.ts
index 144c90eefc..2d0fe0e4a6 100644
--- a/app/statistics/sparql.ts
+++ b/app/statistics/sparql.ts
@@ -2,6 +2,11 @@ import ParsingClient from "sparql-http-client/ParsingClient";
 
 import { DEFAULT_DATA_SOURCE } from "@/domain/data-source";
 import { buildLocalizedSubQuery, iriToNode } from "@/rdf/query-utils";
+import {
+  chunk,
+  IRIS_CHUNK_SIZE,
+  isSafeIri,
+} from "@/statistics/iris";
 
 const sparqlClient = new ParsingClient({
   endpointUrl: DEFAULT_DATA_SOURCE.url,
@@ -46,21 +51,51 @@ export const queryCubesMetadata = async ({
   cubeIris: string[];
   locale: string;
 }): Promise<
-  { iri: string; unversionedIri: string; title: string; creator: string }[]
+  { iri: string; unversionedIri: string; title: string; creator?: string }[]
 > => {
-  const query = getCubeMetadataQuery({ cubeIris, locale });
-  const results = await sparqlClient.query.select(query, {
-    operation: "postUrlencoded",
+  const safeCubeIris = cubeIris.filter(isSafeIri);
+  const normalize = (
+    iri: string,
+    unversionedIri?: string,
+    title?: string,
+    creator?: string
+  ): { iri: string; unversionedIri: string; title: string; creator?: string } => ({
+    iri,
+    unversionedIri: unversionedIri ?? iri,
+    title: title ?? iri,
+    creator,
   });
 
-  return results.map((result) => {
-    const iri = result.iri.value;
+  const queryChunk = async (
+    iris: string[]
+  ): Promise<
+    { iri: string; unversionedIri: string; title: string; creator?: string }[]
+  > => {
+    const query = getCubeMetadataQuery({ cubeIris: iris, locale });
 
-    return {
-      iri,
-      unversionedIri: result.unversionedIri.value ?? iri,
-      title: result.title?.value ?? iri,
-      creator: result.creator?.value,
-    };
-  });
+    try {
+      const rows = await sparqlClient.query.select(query, {
+        operation: "postUrlencoded",
+      });
+
+      return rows.flatMap((result) => {
+        const iri = result.iri?.value;
+
+        return typeof iri === "string"
+          ? [
+              normalize(
+                iri,
+                result.unversionedIri?.value,
+                result.title?.value,
+                result.creator?.value
+              ),
+            ]
+          : [];
+      });
+    } catch {
+      return iris.map((iri) => normalize(iri));
+    }
+  };
+
+  return (await Promise.all(chunk(safeCubeIris, IRIS_CHUNK_SIZE).map(queryChunk))).flat();
 };