Prompt Injection Is Not SQL Injection

The blog explains that while prompt injection and SQL injection both involve untrusted input influencing system behavior, they are fundamentally different. SQL injection exploits how structured queries are interpreted by a database engine, whereas prompt injection manipulates how an AI model interprets or continues a natural language instruction. Because AI models don’t enforce boundaries or a defined grammar the way a database does, traditional defenses like parameterization don’t directly apply. The post warns against treating prompt injection like a conventional code injection flaw and suggests designing AI-involved systems with explicit context isolation, careful prompt construction, and runtime constraints so untrusted content can’t alter intended instructions. 

https://www.ncsc.gov.uk/blog-post/prompt-injection-is-not-sql-injection

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