Flutterby™! : HashJacking just sounds dirty

The Register: HashJack attack shows AI browsers can be fooled with a simple ‘#’

Cato describes HashJack as "the first known indirect prompt injection that can weaponize any legitimate website to manipulate AI browser assistants." It outlines a method where actors sneak malicious instructions into the fragment part of legitimate URLs, which are then processed by AI browser assistants such as Copilot in Edge, Gemini in Chrome, and Comet from Perplexity AI. Because URL fragments never leave the AI browser, traditional network and server defenses cannot see them, turning legitimate websites into attack vectors.

Via.