What Is an AI Prompt Injection Attack? The Hidden Threat Hijacking Your Chatbots

In brief

• Prompt injection is the number one security risk for AI applications.
• The attack works by tricking a chatbot into following an attacker's instructions instead of yours.
• OpenAI publicly admitted in December 2025 that the problem is “unlikely to ever be fully solved,” and the U.K.'s National Cyber Security Centre issued a formal warning that LLMs are 'inherently confusable deputies.'