diff --git a/src/infra/push-apns-http2.test.ts b/src/infra/push-apns-http2.test.ts
index 614b5e9eb80..6c96e36057f 100644
--- a/src/infra/push-apns-http2.test.ts
+++ b/src/infra/push-apns-http2.test.ts
@@ -123,6 +123,25 @@ describe("connectApnsHttp2Session", () => {
     expect(connectSpy).toHaveBeenCalledWith("https://api.push.apple.com");
   });
 
+  it("rejects APNs authorities with non-origin URL components", async () => {
+    const { connectApnsHttp2Session, probeApnsHttp2ReachabilityViaProxy } =
+      await import("./push-apns-http2.js");
+
+    await expect(
+      connectApnsHttp2Session({
+        authority: "https://token@api.push.apple.com",
+        timeoutMs: 10_000,
+      }),
+    ).rejects.toThrow("Unsupported APNs authority");
+    await expect(
+      probeApnsHttp2ReachabilityViaProxy({
+        authority: "https://api.sandbox.push.apple.com/3/device/abc",
+        proxyUrl: "http://proxy.example:8080",
+        timeoutMs: 10_000,
+      }),
+    ).rejects.toThrow("Unsupported APNs authority");
+  });
+
   it("uses an HTTP CONNECT tunnel when managed proxy is active", async () => {
     const registration = registerActiveManagedProxyUrl(new URL("http://proxy.example:8080"));
     const { connectApnsHttp2Session } = await import("./push-apns-http2.js");
diff --git a/src/infra/push-apns-http2.ts b/src/infra/push-apns-http2.ts
index 773aadba019..32cdbe45150 100644
--- a/src/infra/push-apns-http2.ts
+++ b/src/infra/push-apns-http2.ts
@@ -41,6 +41,15 @@ function assertApnsAuthority(authority: string): ApnsAuthority {
   } catch {
     throw new Error(`Unsupported APNs authority: ${authority}`);
   }
+  if (
+    parsed.username ||
+    parsed.password ||
+    parsed.pathname !== "/" ||
+    parsed.search ||
+    parsed.hash
+  ) {
+    throw new Error(`Unsupported APNs authority: ${authority}`);
+  }
   const port = parsed.port && parsed.port !== APNS_DEFAULT_PORT ? `:${parsed.port}` : "";
   const normalized = `${parsed.protocol}//${parsed.hostname}${port}`;
   if (!APNS_AUTHORITIES.has(normalized)) {