HashJack Attack: AI Browsers Fooled by #URL Hijinks in Security Nightmare

HashJack is the latest buzz in the cybersecurity world—a sneaky attack that hides commands after the “#” in URLs, tricking AI browser assistants. It’s like AI’s version of “I didn’t see that coming!” Just when you thought URLs couldn’t get any more exciting, they start moonlighting as attack vectors!

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Hot Take:

It seems AI browser assistants have found a new game of hide and seek with HashJack, hiding malicious prompts right under our noses, or rather, right after the ‘#’. Who knew URLs could become the next great escape room for hackers?

Key Points:

  • HashJack is a newly discovered attack exploiting AI browser assistants by hiding malicious commands in URL fragments.
  • The attack targets AI browsers like Copilot in Edge, Gemini in Chrome, and Comet from Perplexity AI.
  • Because fragments in URLs never leave the AI browser, traditional defenses can’t detect these malicious instructions.
  • Cato Networks alerted major tech companies, with varying responses from Google, Microsoft, and Perplexity AI.
  • The attack highlights the need for new security measures beyond typical network and server-side defenses.

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