Gateway: block profile mutations via browser.request (#43800)

* Gateway: block profile mutations via browser.request

* Changelog: note GHSA-vmhq browser request fix

* Gateway: normalize browser.request profile guard paths

src/gateway/server-methods/browser.profile-from-body.test.ts

@@ -100,4 +100,42 @@ describe("browser.request profile selection", () => {
       }),
     );
   });
+
+  it.each([
+    {
+      method: "POST",
+      path: "/profiles/create",
+      body: { name: "poc", cdpUrl: "http://10.0.0.42:9222" },
+    },
+    {
+      method: "DELETE",
+      path: "/profiles/poc",
+      body: undefined,
+    },
+    {
+      method: "POST",
+      path: "profiles/create",
+      body: { name: "poc", cdpUrl: "http://10.0.0.42:9222" },
+    },
+    {
+      method: "DELETE",
+      path: "profiles/poc",
+      body: undefined,
+    },
+  ])("blocks persistent profile mutations for $method $path", async ({ method, path, body }) => {
+    const { respond, nodeRegistry } = await runBrowserRequest({
+      method,
+      path,
+      body,
+    });
+
+    expect(nodeRegistry.invoke).not.toHaveBeenCalled();
+    expect(respond).toHaveBeenCalledWith(
+      false,
+      undefined,
+      expect.objectContaining({
+        message: "browser.request cannot create or delete persistent browser profiles",
+      }),
+    );
+  });
 });

src/gateway/server-methods/browser.ts

@@ -20,6 +20,26 @@ type BrowserRequestParams = {
   timeoutMs?: number;
 };
 
+function normalizeBrowserRequestPath(value: string): string {
+  const trimmed = value.trim();
+  if (!trimmed) {
+    return trimmed;
+  }
+  const withLeadingSlash = trimmed.startsWith("/") ? trimmed : `/${trimmed}`;
+  if (withLeadingSlash.length <= 1) {
+    return withLeadingSlash;
+  }
+  return withLeadingSlash.replace(/\/+$/, "");
+}
+
+function isPersistentBrowserProfileMutation(method: string, path: string): boolean {
+  const normalizedPath = normalizeBrowserRequestPath(path);
+  if (method === "POST" && normalizedPath === "/profiles/create") {
+    return true;
+  }
+  return method === "DELETE" && /^\/profiles\/[^/]+$/.test(normalizedPath);
+}
+
 function resolveRequestedProfile(params: {
   query?: Record<string, unknown>;
   body?: unknown;
@@ -167,6 +187,17 @@ export const browserHandlers: GatewayRequestHandlers = {
       );
       return;
     }
+    if (isPersistentBrowserProfileMutation(methodRaw, path)) {
+      respond(
+        false,
+        undefined,
+        errorShape(
+          ErrorCodes.INVALID_REQUEST,
+          "browser.request cannot create or delete persistent browser profiles",
+        ),
+      );
+      return;
+    }
 
     const cfg = loadConfig();
     let nodeTarget: NodeSession | null = null;