fix(gateway): harden hooks URL parsing (#26864)

src/gateway/server-http.hooks-request-timeout.test.ts

@@ -41,10 +41,11 @@ function createHooksConfig(): HooksConfigResolved {
 function createRequest(params?: {
   authorization?: string;
   remoteAddress?: string;
+  url?: string;
 }): IncomingMessage {
   return {
     method: "POST",
-    url: "/hooks/wake",
+    url: params?.url ?? "/hooks/wake",
     headers: {
       host: "127.0.0.1:18789",
       authorization: params?.authorization ?? "Bearer hook-secret",
@@ -71,10 +72,11 @@ function createResponse(): {
 function createHandler(params?: {
   dispatchWakeHook?: HooksHandlerDeps["dispatchWakeHook"];
   dispatchAgentHook?: HooksHandlerDeps["dispatchAgentHook"];
+  bindHost?: string;
 }) {
   return createHooksRequestHandler({
     getHooksConfig: () => createHooksConfig(),
-    bindHost: "127.0.0.1",
+    bindHost: params?.bindHost ?? "127.0.0.1",
     port: 18789,
     logHooks: {
       warn: vi.fn(),
@@ -139,4 +141,18 @@ describe("createHooksRequestHandler timeout status mapping", () => {
     expect(mappedRes.statusCode).toBe(429);
     expect(setHeader).toHaveBeenCalledWith("Retry-After", expect.any(String));
   });
+
+  test.each(["0.0.0.0", "::"])(
+    "does not throw when bindHost=%s while parsing non-hook request URL",
+    async (bindHost) => {
+      const handler = createHandler({ bindHost });
+      const req = createRequest({ url: "/" });
+      const { res, end } = createResponse();
+
+      const handled = await handler(req, res);
+
+      expect(handled).toBe(false);
+      expect(end).not.toHaveBeenCalled();
+    },
+  );
 });

src/gateway/server-http.ts

@@ -208,7 +208,7 @@ export function createHooksRequestHandler(
     logHooks: SubsystemLogger;
   } & HookDispatchers,
 ): HooksRequestHandler {
-  const { getHooksConfig, bindHost, port, logHooks, dispatchAgentHook, dispatchWakeHook } = opts;
+  const { getHooksConfig, logHooks, dispatchAgentHook, dispatchWakeHook } = opts;
   const hookAuthLimiter = createAuthRateLimiter({
     maxAttempts: HOOK_AUTH_FAILURE_LIMIT,
     windowMs: HOOK_AUTH_FAILURE_WINDOW_MS,
@@ -227,7 +227,9 @@ export function createHooksRequestHandler(
     if (!hooksConfig) {
       return false;
     }
-    const url = new URL(req.url ?? "/", `http://${bindHost}:${port}`);
+    // Only pathname/search are used here; keep the base host fixed so bind-host
+    // representation (e.g. IPv6 wildcards) cannot break request parsing.
+    const url = new URL(req.url ?? "/", "http://localhost");
     const basePath = hooksConfig.basePath;
     if (url.pathname !== basePath && !url.pathname.startsWith(`${basePath}/`)) {
       return false;