Cybersecurity leaders talked with BI about the rise in demand for workers in the field. MASTER/Getty Images

The exposure was immense, with AI multiplying the risks — and yet time-tested global cybersecurity procedures appeared to be functioning. Then suddenly, it all broke down.

The decision by a cybersecurity company on Wednesday to prematurely release information about a flaw in the popular PHP computer programming language left much of the web exposed to hackers, triggering a panic that brought to life months of warnings of how the AI-powered era could cause widespread damage.

The flaws in PHP, discovered using AI tools through a monthslong process coordinated by OpenAI, caused cyber agencies across Europe, the US, the UK, Australia and Canada to post urgent warnings Wednesday.…