When Your AI Assistant Gets Hijacked Mid-Flight
If you've handed your coding agent an automated task and walked away, this story should make you a little uncomfortable.
A developer recently shared an account of their coding agent nearly being taken over by a prompt injection attack — encountered during an automated task, not in a controlled test environment. The injected prompt attempted to override the agent's original instructions and redirect its behavior. In other words: someone (or something) in the environment tried to tell the agent to do something entirely different than what the developer asked. And it nearly worked.
This Isn't New — But the Stakes Just Got Higher
Prompt injection has been a known issue since large language models started being used in anything resembling a pipeline. The concept is simple and old: if you can get malicious instructions into the input stream of a system that treats instructions and data interchangeably, you can hijack it. We saw this with SQL injection, with XSS, with template injection. The pattern is ancient. What's new is the target.
