fix: deny-by-default API auth + safe SSE controller

src/app/api/tunnel/tailscale-install/route.js

@@ -36,8 +36,14 @@ export async function POST(request) {
   const encoder = new TextEncoder();
   const stream = new ReadableStream({
     async start(controller) {
+      let closed = false;
       const send = (event, data) => {
-        controller.enqueue(encoder.encode(`event: ${event}\ndata: ${JSON.stringify(data)}\n\n`));
+        if (closed) return;
+        try {
+          controller.enqueue(encoder.encode(`event: ${event}\ndata: ${JSON.stringify(data)}\n\n`));
+        } catch {
+          closed = true;
+        }
       };
 
       try {
@@ -52,7 +58,7 @@ export async function POST(request) {
           : error.message;
         send("error", { error: msg });
       } finally {
-        controller.close();
+        if (!closed) { try { controller.close(); } catch {} }
       }
     },
   });

src/dashboardGuard.js

@@ -18,29 +18,60 @@ async function hasValidCliToken(request) {
   return token === await getCliToken();
 }
 
+// Public API paths — no auth required (LLM API has its own key auth inside handler).
+const PUBLIC_API_PATHS = [
+  "/api/health",
+  "/api/init",
+  "/api/locale",
+  "/api/auth/login",
+  "/api/auth/logout",
+  "/api/auth/status",
+  "/api/auth/oidc",
+  "/api/version",
+  "/api/settings/require-login",
+];
+
+// Public top-level prefixes (LLM API endpoints with their own API key auth).
+const PUBLIC_PREFIXES = ["/v1", "/v1beta"];
+
 // Always require JWT token regardless of requireLogin setting
 const ALWAYS_PROTECTED = [
   "/api/shutdown",
   "/api/settings/database",
+  "/api/version/shutdown",
+  "/api/version/update",
+  "/api/oauth/cursor/auto-import",
+  "/api/oauth/kiro/auto-import",
 ];
 
 // Require auth, but allow through if requireLogin is disabled
 const PROTECTED_API_PATHS = [
   "/api/settings",
   "/api/keys",
-  "/api/providers/client",
-  "/api/provider-nodes/validate",
+  "/api/providers",
+  "/api/provider-nodes",
+  "/api/proxy-pools",
+  "/api/combos",
+  "/api/models",
+  "/api/usage",
+  "/api/oauth",
+  "/api/cloud",
+  "/api/media-providers",
+  "/api/pricing",
+  "/api/tags",
   "/api/cli-tools",
   "/api/mcp",
   "/api/translator",
   "/api/tunnel",
 ];
 
-// Routes that spawn child processes — restrict to localhost regardless of auth.
+// Routes that spawn child processes or read host secrets — restrict to localhost.
 const LOCAL_ONLY_PATHS = [
   "/api/cli-tools/cowork-settings",
   "/api/mcp/",
   "/api/tunnel/tailscale-install",
+  "/api/oauth/cursor/auto-import",
+  "/api/oauth/kiro/auto-import",
 ];
 
 const LOOPBACK_HOSTS = new Set(["localhost", "127.0.0.1", "::1"]);
@@ -85,13 +116,18 @@ async function isAuthenticated(request) {
   return false;
 }
 
+function isPublicApi(pathname) {
+  if (PUBLIC_PREFIXES.some((p) => pathname === p || pathname.startsWith(`${p}/`))) return true;
+  return PUBLIC_API_PATHS.some((p) => pathname === p || pathname.startsWith(`${p}/`));
+}
+
 export async function proxy(request) {
   const { pathname } = request.nextUrl;
 
-  // Local-only gate for spawn-capable routes (CVE GHSA-fhh6-4qxv-rpqj).
+  // Local-only gate for spawn-capable / host-secret routes.
   if (LOCAL_ONLY_PATHS.some((p) => pathname.startsWith(p))) {
     if (!isLocalRequest(request)) {
-      return NextResponse.json({ error: "Local only: MCP requires localhost access" }, { status: 403 });
+      return NextResponse.json({ error: "Local only: loopback access required" }, { status: 403 });
     }
   }
 
@@ -102,9 +138,9 @@ export async function proxy(request) {
     return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
   }
 
-  // Protect sensitive API endpoints (allow CLI token, JWT, or requireLogin=false)
-  if (PROTECTED_API_PATHS.some((p) => pathname.startsWith(p))) {
-    if (pathname === "/api/settings/require-login") return NextResponse.next();
+  // Deny-by-default for /api/* — public allow-list bypasses, everything else requires auth.
+  if (pathname.startsWith("/api/")) {
+    if (isPublicApi(pathname)) return NextResponse.next();
     if (await hasValidCliToken(request) || await isAuthenticated(request))
       return NextResponse.next();
     return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
@@ -158,7 +194,3 @@ export async function proxy(request) {
 
   return NextResponse.next();
 }
-
-export const config = {
-  matcher: ["/", "/dashboard/:path*"],
-};

src/proxy.js

@@ -1,18 +1,5 @@
 export { proxy } from "./dashboardGuard";
 
 export const config = {
-  matcher: [
-    "/",
-    "/dashboard/:path*",
-    "/api/shutdown",
-    "/api/settings/:path*",
-    "/api/keys",
-    "/api/keys/:path*",
-    "/api/providers/client",
-    "/api/provider-nodes/validate",
-    "/api/cli-tools/:path*",
-    "/api/mcp/:path*",
-    "/api/translator/:path*",
-    "/api/tunnel/:path*",
-  ],
+  matcher: ["/((?!_next/static|_next/image|favicon\\.ico).*)"],
 };