diff --git a/debian/changelog b/debian/changelog
index 9c31ee1b..55118f5c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,4 @@
-spark-store (5.2.1.5-test) UNRELEASED; urgency=medium
+spark-store (5.2.1.6-test) UNRELEASED; urgency=medium
 
   * Initial release. (Closes: #nnnn)  <nnnn is the bug number of your ITP>
 
diff --git a/electron/main/index.ts b/electron/main/index.ts
index c9cb8616..6b514806 100644
--- a/electron/main/index.ts
+++ b/electron/main/index.ts
@@ -473,9 +473,26 @@ async function createWindow() {
     logger.info("Renderer process is ready.");
   });
 
-  // Make all links open with the browser, not with the application
+  // 仅允许可信域名的 https 链接通过浏览器打开，避免钓鱼/恶意站。
+  // 协议前缀 + 域名后缀白名单双重校验；非法/无效 URL 一律拒绝。
+  const ALLOWED_EXTERNAL_HOSTS = [
+    "spark-app.store",
+    "gitee.com",
+    "bbs.spark-app.store",
+    "spark-app.cn",
+  ];
   mainWindow.webContents.setWindowOpenHandler(({ url }) => {
-    if (url.startsWith("https:")) shell.openExternal(url);
+    try {
+      const parsed = new URL(url);
+      if (
+        parsed.protocol === "https:" &&
+        ALLOWED_EXTERNAL_HOSTS.some((h) => parsed.hostname === h || parsed.hostname.endsWith(`.${h}`))
+      ) {
+        shell.openExternal(url);
+      }
+    } catch {
+      // 无效 URL，拒绝打开
+    }
     return { action: "deny" };
   });
   // win.webContents.on('will-navigate', (event, url) => { }) #344
diff --git a/src/components/AppDetailModal.vue b/src/components/AppDetailModal.vue
index d6743456..93c791b1 100644
--- a/src/components/AppDetailModal.vue
+++ b/src/components/AppDetailModal.vue
@@ -644,8 +644,15 @@ const closeMetaModal = () => {
 };
 
 const openWebsite = (url: string) => {
-  if (url) {
-    window.open(url, "_blank");
+  if (!url) return;
+  try {
+    const parsed = new URL(url);
+    // 仅允许 http/https 协议，杜绝 javascript:/data: 等危险协议
+    if (parsed.protocol === "https:" || parsed.protocol === "http:") {
+      window.open(url, "_blank", "noopener,noreferrer");
+    }
+  } catch {
+    // 无效 URL，不打开
   }
 };
 
diff --git a/src/composables/useAccountSync.ts b/src/composables/useAccountSync.ts
index 99bf97c8..1dc3c466 100644
--- a/src/composables/useAccountSync.ts
+++ b/src/composables/useAccountSync.ts
@@ -319,11 +319,24 @@ const openRestoreFromAccount = async (): Promise<void> => {
   }
 };
 
-const installCloudItems = (items: SyncedAppListItem[]): void => {
-  for (const item of items) {
-    const app = resolveCloudInstallCandidate(item, apps.value);
-    if (!app) continue;
-    void onDetailInstall(app);
+// 批量云端安装：分批触发（每批 3 个），收集每个安装的结果并反馈失败项。
+// onDetailInstall 内部本身已串行排队，这里仅限制"同时发起"的并发，避免一次注入大量任务。
+const installCloudItems = async (items: SyncedAppListItem[]): Promise<void> => {
+  const BATCH_SIZE = 3;
+  let failedCount = 0;
+  for (let i = 0; i < items.length; i += BATCH_SIZE) {
+    const batch = items.slice(i, i + BATCH_SIZE);
+    const results = await Promise.allSettled(
+      batch.map(async (item) => {
+        const app = resolveCloudInstallCandidate(item, apps.value);
+        if (!app) return;
+        await onDetailInstall(app);
+      }),
+    );
+    failedCount += results.filter((r) => r.status === "rejected").length;
+  }
+  if (failedCount > 0) {
+    console.error(`批量云端安装中有 ${failedCount} 项失败`);
   }
   showRestoreModal.value = false;
 };