Analysis
Why Your WAF Can't Read a Prompt Injection - DevCentral
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Why it matters
Prompt injection bypasses the WAF controls many teams assume protect their newly deployed LLM APIs, leaving defenders with a false sense of security and an unmonitored attack surface.
An F5 DevCentral explainer argues that traditional Web Application Firewalls, which inspect the structural syntax of HTTP requests to catch SQL injection and XSS, cannot detect prompt injection because LLM attacks operate at the level of natural-language meaning rather than recognizable payload shapes. The article walks through how LLMs introduce new injection entry and exit points that existing WAF tooling was never designed to see.