By

Megan Cerullo

Reporter, MoneyWatch

Megan Cerullo is a New York-based reporter for CBS MoneyWatch covering small business, workplace, health care, consumer spending and personal finance topics. She regularly appears on CBS News 24/7 to discuss her reporting.

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Updated on: October 22, 2026 / 1:27 PM EDT / CBS News

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Cybersecurity researchers used an advanced OpenAI artificial intelligence model to identify a longstanding internet vulnerability before hackers could exploit it.

That security weakness affects a programming language called PHP, short for "Personal Home Page," which powers up to 70% of the world's websites and web applications, including those used by government agencies and social media platforms such as Facebook.

"PHP is everywhere — not everyone who is using it even knows that they're using it because it's this ubiquitous technology that's been baked into the internet for years and years," Wall Street Journal reporter Robert McMillan, who first…