diff --git a/include/IJavaScriptContext.h b/include/IJavaScriptContext.h
index 7c5ca76..bf82623 100644
--- a/include/IJavaScriptContext.h
+++ b/include/IJavaScriptContext.h
@@ -25,6 +25,7 @@
 class IJavaScriptContext
 {
   public:
+    virtual ~IJavaScriptContext() = default;
     virtual bool runScript(const char *script, bool isModule=true, std::string name="", const char *args = nullptr, bool isApplication=false) = 0;
     virtual bool runFile(const char *file, const char* args, bool isApplication=false) = 0;
     virtual std::string getUrl()  = 0;
diff --git a/src/JSRuntimeServer.cpp b/src/JSRuntimeServer.cpp
index 342f386..3a0793c 100644
--- a/src/JSRuntimeServer.cpp
+++ b/src/JSRuntimeServer.cpp
@@ -80,7 +80,7 @@ class JsonWrap
 
     uint32_t getUint32(const char *name, bool &err)
     {
-        uint32_t res;
+        uint32_t res = 0;
         cJSON *itm = cJSON_GetObjectItem(mPtr, name);
         if (!itm || !cJSON_IsNumber(itm))
         {
diff --git a/src/NativeJSRenderer.cpp b/src/NativeJSRenderer.cpp
index bee81b9..b73f508 100644
--- a/src/NativeJSRenderer.cpp
+++ b/src/NativeJSRenderer.cpp
@@ -506,8 +506,9 @@ void NativeJSRenderer::run()
         if(!mTestFileName.empty())
         {
             ModuleSettings settings;
+            uint32_t testId = createApplicationIdentifier();
 	    settings.enableJSDOM = mEnableTestFileDOMSupport;
-	    ApplicationRequest appRequest(id, RUN, mTestFileName, settings.enableHttp, settings.enableXHR, settings.enableWebSocket, settings.enableWebSocketEnhanced, settings.enableFetch, settings.enableJSDOM, settings.enableWindow, settings.enablePlayer);
+	    ApplicationRequest appRequest(testId, RUN, mTestFileName, settings.enableHttp, settings.enableXHR, settings.enableWebSocket, settings.enableWebSocketEnhanced, settings.enableFetch, settings.enableJSDOM, settings.enableWindow, settings.enablePlayer);
 	    NativeJSRenderer::createApplicationInternal(appRequest);
 	    NativeJSRenderer::runApplicationInternal(appRequest);
 	    mTestFileName = "";
diff --git a/src/jsc/JavaScriptContext.cpp b/src/jsc/JavaScriptContext.cpp
index a0af753..09ee2f4 100644
--- a/src/jsc/JavaScriptContext.cpp
+++ b/src/jsc/JavaScriptContext.cpp
@@ -121,6 +121,10 @@ if (mModuleSettings.enablePlayer)
     mPriv->releaseAllProtected();
     JSGlobalContextRelease(mContext);
     JSContextGroupRelease(mContextGroup);
+    if (mNetworkMetricsData) {
+        delete mNetworkMetricsData;
+        mNetworkMetricsData = nullptr;
+    }
     rtLogInfo("%s end", __FUNCTION__);
 }
 
diff --git a/src/jsc/JavaScriptUtils.cpp b/src/jsc/JavaScriptUtils.cpp
index 5476746..4f1a50a 100644
--- a/src/jsc/JavaScriptUtils.cpp
+++ b/src/jsc/JavaScriptUtils.cpp
@@ -314,24 +314,61 @@ rtError rtSetVideoStartTimeBinding(int numArgs, const rtValue* args, rtValue* re
 
 rtError rtReadBinaryBinding(int numArgs, const rtValue* args, rtValue* result, void* context)
 {
-  char *buffer = nullptr;
-  FILE *ptr = nullptr;
-  ptr = fopen("hello.wasm","rb");  // r for read, b for binary
+  UNUSED_PARAM(context);
+
+  // 1. Validate numArgs and use args for filename
+  if (numArgs < 1 || args[0].getType() != RT_stringType) {
+    rtLogError("%s: missing or invalid file path", __FUNCTION__);
+    return RT_ERROR_INVALID_ARG;
+  }
 
-  const char *fd = "hello.wasm";
+  const char *fd = args[0].toString().cString();
+  FILE *ptr = fopen(fd, "rb");
+
+  // 2. Check fopen
+  if (!ptr) {
+    rtLogError("Failed to open file: %s", fd);
+    return RT_ERROR;
+  }
+
+  // 3. Check stat
   struct stat buf;
+  if (stat(fd, &buf) != 0) {
+    rtLogError("Failed to stat file: %s", fd);
+    fclose(ptr);
+    return RT_ERROR;
+  }
 
-  stat(fd, &buf);
   int size = buf.st_size;
+  if (size <= 0) {
+    rtLogError("Invalid file size: %d", size);
+    fclose(ptr);
+    return RT_ERROR;
+  }
 
-  buffer = (char*)malloc(size);
-  fread(buffer,size,1,ptr); // read 10 bytes to our buffer
-  fclose(ptr);
+  // 4. Check malloc
+  char *buffer = (char*)malloc(size);
+  if (!buffer) {
+    rtLogError("Failed to allocate memory for file: %s", fd);
+    fclose(ptr);
+    return RT_ERROR;
+  }
 
-  if (result)
-  {
-      result->setString(buffer);
+  // 5. Robust fread
+  size_t bytesRead = fread(buffer, 1, size, ptr);
+  if (bytesRead != (size_t)size) {
+    rtLogError("Failed to read complete file. Expected %d bytes, read %zu bytes", size, bytesRead);
+    free(buffer);
+    fclose(ptr);
+    return RT_ERROR;
+  }
+
+  // 6. Set result only if buffer is valid
+  if (result) {
+    result->setString(buffer);
   }
+  free(buffer);
+  fclose(ptr);
   return RT_OK;
 }
 
@@ -693,6 +730,7 @@ rtError rtJSRuntimeDownloadMetrics(int numArgs, const rtValue* args, rtValue* re
   rtValue keys;
   if (map->Get("allKeys", &keys) != RT_OK) {
     rtLogWarn("Could not retrieve url for network metrics data.");
+    delete netMetricsArray;
     return RT_FAIL;
   }
   rtObjectRef objRef = keys.toObject();
@@ -700,6 +738,7 @@ rtError rtJSRuntimeDownloadMetrics(int numArgs, const rtValue* args, rtValue* re
 
   if (!keysArray) {
     rtLogWarn("No url found in the network metrics data.");
+    delete netMetricsArray;
     return RT_FAIL;
   }
 
@@ -715,6 +754,7 @@ rtError rtJSRuntimeDownloadMetrics(int numArgs, const rtValue* args, rtValue* re
       NetworkMetrics* metrics = (NetworkMetrics*)storedValue.toVoidPtr();
       if (!metrics) {
         rtLogError("Failed to cast stored value to NetworkMetrics structure for url: %s.", key.cString());
+        delete netMetricsArray;
         return RT_FAIL;
       }
       rtMapObject* metricsMap = new rtMapObject();