# Japan will set up a task force to address cybersecurity risks in its financial system.

*fintech, genai · news · 2026-04-24 · Reuters*

## Key points

- Japan will establish a cybersecurity task force focused on risks from Anthropic's Mythos AI model.
- Anthropic's Mythos AI preview identified thousands of major vulnerabilities in all major operating systems and browsers.
- Experts warn Mythos can discover and exploit unknown vulnerabilities faster than companies can patch them.
- No breaches linked to Mythos have been reported yet, but regulators globally are warning banks to strengthen defenses.

TOKYO, April 24 (Reuters) - Japan will set up a task force to address cybersecurity risks in its financial ​system following concerns about potential vulnerabilities linked to ‌Anthropic's Mythos AI model, Finance Minister Satsuki Katayama said on Friday. Sign up here. "I told the meeting ​that this is a crisis that is already at hand, ​and similar concerns were also voiced by the financial industry," she said. Concerns have intensified after Anthropic said a preview of Mythos ​uncovered "thousands" of major vulnerabilities across every major operating system ​and web browser, raising fears about the resilience of traditional software ‌security. Experts ⁠warn the model can identify and exploit previously unknown vulnerabilities faster than companies can repair them, accelerating cyberattacks in sectors such as banking that rely on complex, ​interconnected and often ​decades-old technology. Regulators ⁠elsewhere in Asia, Europe and the United States have warned banks to review defences and ​preparedness. To date, there have been no ​reported breaches ⁠related to the model. Katayama said the financial system's high level of interconnectedness and real-time operations mean that problems can ⁠spread ​more rapidly than in other ​sectors. "Because of this, a cyberattack can immediately spill over into market disruptions ​and undermine confidence." Reporting by Makiko Yamazaki; Editing by Sam Holmes

**Companies:** Anthropic
**Countries:** Japan, United States

[Read the full story on Reuters](https://www.reuters.com/sustainability/boards-policy-regulation/japan-launches-financial-task-force-amid-ai-security-fears-2026-04-24/)

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