diff --git a/tools/editor/quest_editor.cpp b/tools/editor/quest_editor.cpp
index 7e419cec..94041b70 100644
--- a/tools/editor/quest_editor.cpp
+++ b/tools/editor/quest_editor.cpp
@@ -102,10 +102,19 @@ bool QuestEditor::loadFromFile(const std::string& path) {
             if (jq.contains("objectives") && jq["objectives"].is_array()) {
                 for (const auto& jo : jq["objectives"]) {
                     QuestObjective obj;
-                    obj.type = static_cast<QuestObjectiveType>(jo.value("type", 0));
+                    int t = jo.value("type", 0);
+                    // Clamp to known QuestObjectiveType range to avoid
+                    // garbage enum values from edited JSON.
+                    if (t < 0 || t > 5) t = 0;
+                    obj.type = static_cast<QuestObjectiveType>(t);
                     obj.description = jo.value("desc", "");
                     obj.targetName = jo.value("target", "");
                     obj.targetCount = jo.value("count", 1u);
+                    if (obj.targetCount == 0) obj.targetCount = 1;
+                    if (obj.targetCount > 1000) obj.targetCount = 1000;
+                    // Cap stored objectives to 10 (matches SQL slot capacity)
+                    // — also bounds the per-quest memory.
+                    if (q.objectives.size() >= 10) break;
                     q.objectives.push_back(obj);
                 }
             }