diff --git a/src/Components/Modules/GSC/IO.cpp b/src/Components/Modules/GSC/IO.cpp
index 3709bfb7..5d67f4f7 100644
--- a/src/Components/Modules/GSC/IO.cpp
+++ b/src/Components/Modules/GSC/IO.cpp
@@ -15,6 +15,15 @@ namespace Components::GSC
 		const auto* filepath = Game::Scr_GetString(0);
 		const auto* mode = Game::Scr_GetString(1);
 
+		for (std::size_t i = 0; i < std::extent_v<decltype(ForbiddenStrings)>; ++i)
+		{
+			if (std::strstr(filepath, ForbiddenStrings[i]) != nullptr)
+			{
+				Logger::PrintError(Game::CON_CHANNEL_PARSERSCRIPT, "OpenFile: directory traversal is not allowed!\n");
+				return;
+			}
+		}
+
 		if (mode != "read"s)
 		{
 			Logger::PrintError(Game::CON_CHANNEL_PARSERSCRIPT, "Valid openfile modes are 'read'\n");