This blog post discusses vulnerabilities in Generative AI applications and demonstrates practical examples of prompt injection attacks. The author builds a test application using AWS Amplify, Amazon Bedrock, and React to create an AI assistant for an online store. Initial tests reveal successful attacks through role-switching, indirect injection, and context window manipulation. To address these vulnerabilities, the author implements Amazon Bedrock Guardrails, which effectively blocks the previously successful attacks. The post highlights the importance of multiple layers of security controls, the limitations of foundation model guardrails, and the need for regular security testing in GenAI applications. It also emphasizes the rapid prototyping capabilities of AWS Amplify and the AI Kit while noting the current lack of integrated Bedrock Guardrails support.