diff --git a/.github/renovate.json5 b/.github/renovate.json5
index 300187cc4..93988b4fb 100644
--- a/.github/renovate.json5
+++ b/.github/renovate.json5
@@ -22,6 +22,22 @@
     'updatePinnedDependencies': false
   },
   packageRules: [
+    {
+      description: 'Block Node.js major updates because Node 26 fails the Renovate dependency lint in Flint',
+      matchManagers: [
+        'mise',
+      ],
+      matchDatasources: [
+        'node-version',
+      ],
+      matchDepNames: [
+        'node',
+      ],
+      matchUpdateTypes: [
+        'major',
+      ],
+      enabled: false,
+    },
     {
       description: 'Update component-prefixed shared-workflow action tags',
       matchManagers: [