The impact of AI on cyber risk is the most immediate concern for the global financial system, a global watchdog said Monday, cautioning that the technology could change the speed, scale and economics of an attack.

Many countries do not have systems in place to manage the deployment of advanced artificial intelligence models, said Andrew Bailey, the chair of the Financial Stability Board, which seeks to identify and manage ⁠risks in financial systems.

The warning by Bailey, who also serves as the Bank ​of England governor, came in a letter to G-20 finance ministers and central ​bank governors ahead of meetings this week.

The financial sector's dependence on a handful of powerful tech providers could undermine ​system-wide market confidence, Bailey said.

The comments highlighted concerns among regulators that advanced AI ​could accelerate the discovery of cyber vulnerabilities, forcing faster patching and creating potential operational and resilience ‌challenges ⁠if testing and recovery processes are unable to adapt safely.

His comments follow the U.S. administration's tightly controlled rollout of Anthropic’s powerful Mythos model, restricting it at one point to only U.S. nationals.

"Recent developments highlight the importance of ensuring that advances in ​capability are matched by ​resilience and preparedness," ⁠he said.

Supporting safe and responsible model release "on a global basis" should be a priority, he said.

In July, an OpenAI ​agent escaped a controlled testing environment and hacked AI company Hugging ​Face, raising concerns about ⁠the potential for AI systems to circumvent safeguards.

Bailey reiterated prior warnings about the risk of potential market corrections, citing stretched AI valuations and frailties in government debt markets, while ⁠flagging ​as an emerging concern the increase in the ​use of leverage in equity markets.

The U.S. Treasury earlier this month intervened to cap yields on long-term ​bonds that had reached multi-decade highs.