Prompt Injection Shares Roots with Traditional Injection Attacks
WesEklund · x · 2026-07-10
This post categorizes SQL injection, XSS, and Prompt injection as the exact same vulnerability: user input being treated as an instruction.
The author emphasizes that the common root cause for all three is directly concatenating untrusted data into control logic:
- SQL: input becomes query logic
- HTML: input becomes page code
- LLM: input becomes system behavior
The corresponding fix is also identical: separate the control plane from the data plane, and never directly connect untrusted input to components that affect behavior.
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