diff --git a/src/stores/settingStore.ts b/src/stores/settingStore.ts
index cccad02aa..7995de14c 100644
--- a/src/stores/settingStore.ts
+++ b/src/stores/settingStore.ts
@@ -1,3 +1,4 @@
+import _ from 'lodash'
 import { defineStore } from 'pinia'
 import type { TreeNode } from 'primevue/treenode'
 import { computed, ref } from 'vue'
@@ -74,7 +75,12 @@ export const useSettingStore = defineStore('setting', () => {
    * @param value - The value to set.
    */
   async function set<K extends keyof Settings>(key: K, value: Settings[K]) {
-    const newValue = tryMigrateDeprecatedValue(settingsById.value[key], value)
+    // Clone the incoming value to prevent external mutations
+    const clonedValue = _.cloneDeep(value)
+    const newValue = tryMigrateDeprecatedValue(
+      settingsById.value[key],
+      clonedValue
+    )
     const oldValue = get(key)
     if (newValue === oldValue) return
 
@@ -89,7 +95,8 @@ export const useSettingStore = defineStore('setting', () => {
    * @returns The value of the setting.
    */
   function get<K extends keyof Settings>(key: K): Settings[K] {
-    return settingValues.value[key] ?? getDefaultValue(key)
+    // Clone the value when returning to prevent external mutations
+    return _.cloneDeep(settingValues.value[key] ?? getDefaultValue(key))
   }
 
   /**
diff --git a/tests-ui/tests/store/settingStore.test.ts b/tests-ui/tests/store/settingStore.test.ts
index fbc42aae4..b277f72ae 100644
--- a/tests-ui/tests/store/settingStore.test.ts
+++ b/tests-ui/tests/store/settingStore.test.ts
@@ -160,6 +160,95 @@ describe('useSettingStore', () => {
         'differentvalue'
       )
     })
+
+    describe('object mutation prevention', () => {
+      beforeEach(() => {
+        const setting: SettingParams = {
+          id: 'test.setting',
+          name: 'Test setting',
+          type: 'hidden',
+          defaultValue: {}
+        }
+        store.addSetting(setting)
+      })
+
+      it('should prevent mutations of objects after set', async () => {
+        const originalObject = { foo: 'bar', nested: { value: 123 } }
+
+        await store.set('test.setting', originalObject)
+
+        // Attempt to mutate the original object
+        originalObject.foo = 'changed'
+        originalObject.nested.value = 456
+
+        // Get the stored value
+        const storedValue = store.get('test.setting')
+
+        // Verify the stored value wasn't affected by the mutation
+        expect(storedValue).toEqual({ foo: 'bar', nested: { value: 123 } })
+      })
+
+      it('should prevent mutations of retrieved objects', () => {
+        const initialValue = { foo: 'bar', nested: { value: 123 } }
+
+        // Set initial value
+        store.set('test.setting', initialValue)
+
+        // Get the value and try to mutate it
+        const retrievedValue = store.get('test.setting')
+        retrievedValue.foo = 'changed'
+        if (retrievedValue.nested) {
+          retrievedValue.nested.value = 456
+        }
+
+        // Get the value again
+        const newRetrievedValue = store.get('test.setting')
+
+        // Verify the stored value wasn't affected by the mutation
+        expect(newRetrievedValue).toEqual({
+          foo: 'bar',
+          nested: { value: 123 }
+        })
+      })
+
+      it('should prevent mutations of arrays after set', async () => {
+        const originalArray = [1, 2, { value: 3 }]
+
+        await store.set('test.setting', originalArray)
+
+        // Attempt to mutate the original array
+        originalArray.push(4)
+        if (typeof originalArray[2] === 'object') {
+          originalArray[2].value = 999
+        }
+
+        // Get the stored value
+        const storedValue = store.get('test.setting')
+
+        // Verify the stored value wasn't affected by the mutation
+        expect(storedValue).toEqual([1, 2, { value: 3 }])
+      })
+
+      it('should prevent mutations of retrieved arrays', () => {
+        const initialArray = [1, 2, { value: 3 }]
+
+        // Set initial value
+        store.set('test.setting', initialArray)
+
+        // Get the value and try to mutate it
+        const retrievedArray = store.get('test.setting')
+        retrievedArray.push(4)
+        if (typeof retrievedArray[2] === 'object') {
+          retrievedArray[2].value = 999
+        }
+
+        // Get the value again
+        const newRetrievedValue = store.get('test.setting')
+
+        // Verify the stored value wasn't affected by the mutation
+        expect(newRetrievedValue).toEqual([1, 2, { value: 3 }])
+      })
+    })
   })
 })