On October 21, 2026, two critical security vulnerabilities were disclosed in PHP, a widely used programming language that powers millions of websites, including those built on WordPress.
The vulnerabilities, identified as CVE-2026-109618 and CVE-2026-109619, involved flaws in how PHP processes website requests and manages server memory. If exploited, these weaknesses could potentially allow unauthorized individuals to execute malicious code on a website's server, access sensitive information, or disrupt website operations.
Because these vulnerabilities affected PHP itself rather than a specific WordPress plugin or website, they posed a widespread security risk for websites using affected versions of the software.
The good news is that security patches have been released and successfully deployed by some hosting providers.
Hosting providers such as WP Engine responded quickly, implementing additional security protections while the necessary updates were being deployed. WP Engine confirmed that its PHP security updates were completed on October 21, resolving the vulnerabilities for websites running on its platform.
However, not all websites use the same hosting provider or PHP version, so it's important for organizations to confirm that their own systems have been updated.
Businesses are encouraged to contact their IT teams, website administrators, or hosting providers to verify that the appropriate security patches have been applied, particularly to any websites, client portals, or other systems that rely on PHP.
For additional information, visit WP Engine's official security update.