AI Cyber Fears Reach Global Banking

Anthropic says Claude Mythos Preview has identified thousands of additional high- and critical-severity vulnerabilities and is not being made generally available. The Bank of England said it is testing AI risks to the financial system through scenario analysis and simulations. German banks, BaFin, the finance ministry, and other authorities are assessing the risks tied to Mythos. ECB supervisors are preparing to question banks about the model’s potential cyber threat. OpenAI has launched GPT-5.4-Cyber for vetted security organizations, showing how quickly cyber-focused AI deployment is accelerating. Banking regulators shift focus to AI cyber risk Global financial officials are moving quickly to assess the banking risks linked to the latest generation of AI models after Anthropic’s Claude Mythos Preview raised fresh concerns about cyber vulnerability across the sector. Anthropic says the model has identified thousands of additional high- and critical-severity vulnerabilities and has kept access restricted under Project Glasswing rather than releasing it publicly. That response is now spilling into financial supervision. The Bank of England said this week that it is testing the risks AI could pose to the financial system through scenario analysis and simulations, while Reuters reported that ECB supervisors are preparing to question banks about Mythos-related threats. Officials and banks are now assessing the threat In Germany, banks and national authorities are already examining the risks tied to Mythos. Reuters reported that the discussions involve the German Banking Association, the finance ministry, the Bundesbank and BaFin, with officials warning that financial firms must be ready to address newly discovered vulnerabilities quickly. The issue is also moving up the policy chain in the United States. Reuters reported last week that Treasury Secretary Scott Bessent and Federal Reserve Chair Jerome Powell discussed Anthropic model risks with bank CEOs, highlighting ho