Containment Breach refers to an incident where a secure area or facility fails to contain hazardous materials, dangerous entities, or sensitive information. This can occur in various settings, such as laboratories, prisons, or research facilities, leading to potential risks for personnel and the surrounding environment. In the context of SCP Foundation, a fictional organization, containment breaches often involve anomalous objects or creatures escaping their secure enclosures. These breaches can result in chaos, requiring immediate response measures to re-establish control and ensure safety for all involved.