Update, October 26, 2026: Since this article was first published, security agencies and vendors have added more detail. The two flaws are now widely known as PHP2Shell. India’s CERT-In and New Zealand’s NCSC both refer to exploitation in the wild, PHP says no configuration change fully mitigates the issue, and the PHP security team also released source backports for some end-of-life branches. This version reflects those updates. A critical PHP security vulnerability alert issued in October 2026 has put PHP-powered websites and applications on high alert. The PHP development team…
Read MoreCritical PHP Security Vulnerability 2026: Risks, Fixed Versions and How to Protect Your Website
