May 4, 2026 — 5:01am
Australia’s largest cybersecurity firm has issued an urgent warning about a powerful new artificial intelligence tool that can find and exploit flaws in software at unprecedented speed and scale, and which experts fear could trigger the next wave of major data breaches.
CyberCX on Thursday told Australian businesses, banks and infrastructure operators they had a closing window to shore up their defences before the technology, or copies of it, reach the hands of criminals.
The warning deals with Claude Mythos Preview, an unreleased AI model built by US company Anthropic that the firm has deemed too dangerous to release publicly. Anthropic has restricted access to about 50 major technology and infrastructure partners – including Microsoft, Google, Apple, Amazon and JPMorgan Chase – under a program called Project Glasswing.
Mythos has already uncovered thousands of previously unknown software flaws, including a 27-year-old bug in an operating system used in firewalls and internet routers worldwide. In one test, it produced 181 working attacks against the Firefox web browser. An earlier, publicly available version managed just two.
