Palantir: PHP2Shell: What Happened and How to Know Your Site Is Safe

PHP2Shell: What Happened and How to Know Your Site Is Safe demet Fri, 10/23/2026 - 10:18 A pair of critical PHP vulnerabilities affected much of the web this week. Here’s how they were fixed, how to check your site, and how to stay protected going forward. This week’s disclosure of PHP2Shell, a pair of security vulnerabilities that impacted up to two-thirds of the internet and resulted in the temporary shutdown of many high-profile websites, was, for many people, the first real look at how AI is changing digital security.