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prompt injection
Definition of prompt injection
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: an attack in which hidden instructions are slipped into content an AI reads, such as a web page, email, or document, causing it to follow the attacker's instructions instead of the user's
- White text on the web page said 'ignore previous instructions'—a classic prompt injection.
- Prompt injection is the biggest unsolved security problem for agents.
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Origin & history
first known use2022
Named by programmer Simon Willison in September 2022, by analogy with 'SQL injection'.
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Cite this entry
"Prompt injection." AI Dictionary, Dadgogo, https://dadgogo.com/dictionary/prompt-injection/. Accessed 24 Oct. 2026.
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