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Critical security vulnerabilities in PHP, a programming language used by about 70% of websites worldwide, were discovered with the help of artificial intelligence, prompting government agencies and companies across the U.S., Europe, and Japan to temporarily take websites offline as a precaution, Yonhap and Chosun Ilbo report. The PHP developers released an emergency patch on October 21, and the U.S. NSA advised organizations to go offline if they cannot patch quickly. Korean media emphasize that AI found flaws that humans had missed for years, raising fears that hackers could use AI for large-scale attacks. Experts quoted by Kyunghyang Shinmun call it a 'double-edged sword,' noting future battles may be between AIs. A Yonhap analysis notes the PHP Foundation had seen signs of the issue two years ago but could not fix it, and the flaws were found using an OpenAI model, though details leaked.