Daniel Miessler 11/26/2025

Is Prompt Injection a Vulnerability?

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The article debates whether prompt injection qualifies as a vulnerability in AI systems. It responds to a counter-argument that prompt injection is often a delivery mechanism, not the root vulnerability. The author defines prompt injection and argues it is a genuine vulnerability when a system cannot distinguish instructions from data, impacting security assessments and bug bounties.

Is Prompt Injection a Vulnerability?

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