Is it safe to eat cooked green beans unrefrigerated 12 hours?

It is generally not safe to eat cooked green beans that have been left unrefrigerated for 12 hours. Cooked foods should not be left at room temperature for more than two hours, as bacteria can multiply rapidly in that time, increasing the risk of foodborne illness. To ensure food safety, it’s best to refrigerate leftovers promptly and consume them within a few days.