Security Privacy And RiskRisk

Hidden prompt injection attacks against AI agents in HTML

April 6, 2026Aakash Gupta

Aakash Gupta warns the web is becoming hostile to agents, citing research that hidden instructions embedded in webpages can hijack agent behavior in most scenarios, making browsing and tool use a security risk.

The internet is about to become a minefield for AI agents, and the success rate for attackers is 86%.
Hidden prompt injections in HTML successfully commandeer agents in 86% of scenarios.
Just instructions hidden in a webpage that the agent
Aakash Gupta
securityprompt injectioncoding agents

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