I've been working on making the "lethal trifecta" concept more popular in France. We should dedicate a statue to Simon Wilinson: this security vulnerability is kinda obvious if you know a bit about AI agents but actually naming it is incredibly helpful for spreading knowledge. Reading the sentence "// indirect prompt injection via email" makes me so happy here, people may finally get it for good.
TIL "lethal trifecta"
I'll save you a search: https://simonwillison.net/2025/Jun/16/the-lethal-trifecta/