The Cayman Islands Government announced on October 22 that it was reviewing systems for critical PHP vulnerabilities, one day after the widely-used software released security updates. The flaws, CVE-2026-109618 and CVE-2026-109619, can allow an attacker without login credentials to remotely run code on a vulnerable web server.
PHP (PHP Hypertext Preprocessor) is a scripting language used on web servers for website development to create dynamic, interactive web pages. Many established websites and business applications use PHP, and Wordpress - one of the world’s most popular web content management systems - is powered by PHP’s server-side functionality.
The Cayman Government stated that GOV.KY and myegov.ky run on a platform that does not use PHP, so the vulnerabilities do not directly affect that platform. Other goverment systems require independent assessment. No breaches or affected government services were announced.
Exposure is dependent on systems and is not limited to geography. All Caribbean businesses and organisations have been highly encouraged to establish where PHP is used and who maintains it, and to perform prompt exposure checks and remediation. The UK National Cyber Security Centre (NCSC) also warned that appliances and services can bundle PHP, so an inventory limited to public websites may miss dependencies.
PHP identified its fixed releases as 8.5.12, 8.4.27, 8.3.36 and 8.2.35. The NCSC and the PHP Foundation issued guidance that included:
assessing exposure (regardless of version);
applying available security updates and mitigations; and
monitoring for signs of system compromise.
Leaders should ask their responsible team or IT provider to identify affected services, document the applicable fix and distinguish completed work from systems still awaiting assessment. Any suspected compromise should be reported and have its own investigation.
TAKEAWAY: Obtain a documented PHP exposure and remediation status for each relevant service, with an owner for every unresolved system.
WHY THIS MATTERS: For Caribbean organizations using PHP, emergency fixes require a service-by-service assessment that includes technology maintained by external providers.
