AI's 'Black October': Critical PHP flaws set off global security scramble

Researchers at Google's Wiz and the AI firm Calif discovered major vulnerabilities in PHP in August by using advanced AI models from OpenAI and Google.

Major AI companies have been warning about the technology's advancing cybersecurity capabilities since April, when Anthropic announced a limited rollout of its powerful model called Mythos.

Experts believe the PHP security flaws serve as the latest example of what's to come.

"This is a significant week or two in cybersecurity," Krebs told CNBC's "Squawk Box."

—CNBC's Isabel O’Brien contributed to this report WATCH: Chris Krebs on AI discovering cyber vulnerabilities: It’ll get worse before it gets better