Anthropic to share Mythos cyber flaw findings with global finance watchdog
Summary
Anthropic is briefing global financial regulators on Claude Mythos, an AI model with advanced capabilities in finding previously unknown cybersecurity flaws that hackers could exploit. Rather than releasing Mythos publicly, Anthropic has restricted access to selected tech companies and banks to help identify weaknesses, while the UK's AI Security Institute has found the latest version shows a significant capability jump, even completing a difficult autonomous hacking test that no prior model had solved.
Solution / Mitigation
UK regulators and the Treasury released guidance directing firms to 'double down' on 'core cyber hygiene,' which includes reviewing legacy systems, implementing good detection mechanisms, establishing proper governance, planning recovery procedures, and considering insurance coverage.
Classification
Affected Vendors
Related Issues
Original source: https://www.theguardian.com/technology/2026/may/18/anthropic-ai-claude-mythos-cyber-financial-stability-board-fsb
First tracked: May 18, 2026 at 02:00 PM
Classified by LLM (prompt v3) · confidence: 85%