diff --git a/src/web-server/routes/cursor-routes.ts b/src/web-server/routes/cursor-routes.ts
index 220dae9a..f3c5eafc 100644
--- a/src/web-server/routes/cursor-routes.ts
+++ b/src/web-server/routes/cursor-routes.ts
@@ -18,6 +18,7 @@ import {
 
 import cursorSettingsRoutes from './cursor-settings-routes';
 import { getCursorConfig } from '../../config/config-loader-facade';
+import { isDashboardWebSocketOriginAllowed } from '../middleware/auth-middleware';
 
 const router = Router();
 
@@ -192,7 +193,12 @@ router.get('/models', async (_req: Request, res: Response): Promise<void> => {
 /**
  * POST /api/cursor/probe - Run a live authenticated runtime probe
  */
-router.post('/probe', async (_req: Request, res: Response): Promise<void> => {
+router.post('/probe', async (req: Request, res: Response): Promise<void> => {
+  if (!isDashboardWebSocketOriginAllowed(req)) {
+    res.status(403).json({ error: 'Cross-origin probe requests are not allowed.' });
+    return;
+  }
+
   try {
     const cursorConfig = getCursorConfig();
     const result = await probeCursorRuntime(cursorConfig);
diff --git a/tests/unit/web-server/cursor-routes.test.ts b/tests/unit/web-server/cursor-routes.test.ts
index 5934ed9c..2ff96d7b 100644
--- a/tests/unit/web-server/cursor-routes.test.ts
+++ b/tests/unit/web-server/cursor-routes.test.ts
@@ -510,6 +510,17 @@ describe('Cursor Routes Logic', () => {
       expect(json.current).toBe('gpt-5.3-codex');
     });
 
+    it('POST /api/cursor/probe rejects cross-origin requests', async () => {
+      const res = await fetch(`${baseUrl}/api/cursor/probe`, {
+        method: 'POST',
+        headers: { Origin: 'https://attacker.example' },
+      });
+      expect(res.status).toBe(403);
+
+      const json = (await res.json()) as { error?: string };
+      expect(json.error).toContain('Cross-origin probe requests are not allowed.');
+    });
+
     it('POST /api/cursor/probe returns auth failure when credentials are missing', async () => {
       const res = await fetch(`${baseUrl}/api/cursor/probe`, { method: 'POST' });
       expect(res.status).toBe(401);