diff --git a/src/inspector/v8-console-message.cc b/src/inspector/v8-console-message.cc
index b1a24e81c90..de3bb1ee4ab 100644
--- a/src/inspector/v8-console-message.cc
+++ b/src/inspector/v8-console-message.cc
@@ -581,7 +581,11 @@ void V8ConsoleMessageStorage::addMessage(
           session->consoleAgent()->messageAdded(message.get());
         session->runtimeAgent()->messageAdded(message.get());
       });
-  if (!inspector->hasConsoleMessageStorage(contextGroupId)) return;
+  // The forEachSession callback above may run page JavaScript via
+  // wrapArguments, which can call resetContextGroup() (frees `this`) and then
+  // ensureConsoleMessageStorage() (re-inserts a fresh storage under the same
+  // key). Guard against both deletion and replacement of `this`.
+  if (inspector->getConsoleMessageStorage(contextGroupId) != this) return;
 
   DCHECK(m_messages.size() <= maxConsoleMessageCount);
   if (m_messages.size() == maxConsoleMessageCount) {
diff --git a/src/inspector/v8-inspector-impl.cc b/src/inspector/v8-inspector-impl.cc
index b57097472e2..c8527e9db35 100644
--- a/src/inspector/v8-inspector-impl.cc
+++ b/src/inspector/v8-inspector-impl.cc
@@ -136,6 +136,13 @@ V8ConsoleMessageStorage* V8InspectorImpl::ensureConsoleMessageStorage(
   return storageIt->second.get();
 }
 
+V8ConsoleMessageStorage* V8InspectorImpl::getConsoleMessageStorage(
+    int contextGroupId) {
+  auto storageIt = m_consoleStorageMap.find(contextGroupId);
+  if (storageIt == m_consoleStorageMap.end()) return nullptr;
+  return storageIt->second.get();
+}
+
 bool V8InspectorImpl::hasConsoleMessageStorage(int contextGroupId) {
   auto storageIt = m_consoleStorageMap.find(contextGroupId);
   return storageIt != m_consoleStorageMap.end();
diff --git a/src/inspector/v8-inspector-impl.h b/src/inspector/v8-inspector-impl.h
index cf4e63cac6e..780812078a7 100644
--- a/src/inspector/v8-inspector-impl.h
+++ b/src/inspector/v8-inspector-impl.h
@@ -133,6 +133,7 @@ class V8InspectorImpl : public V8Inspector {
   void muteExceptions(int contextGroupId);
   void unmuteExceptions(int contextGroupId);
   V8ConsoleMessageStorage* ensureConsoleMessageStorage(int contextGroupId);
+  V8ConsoleMessageStorage* getConsoleMessageStorage(int contextGroupId);
   bool hasConsoleMessageStorage(int contextGroupId);
   void discardInspectedContext(int contextGroupId, int contextId);
   void disconnect(V8InspectorSessionImpl*);