PHP emergency patches drop after overnight leak of PHP2Shell RCE bugs. Governments in Europe are shutting down their websites.

PHP warned October 20 of two critical remote code execution flaws, both rated CVSS 9.2, scheduled for release October 21 at 2 p.m. UTC. Details and an exploit tool called PHP2Shell leaked overnight. Cloudflare reported early attacks. CERT-EU and others told operators unable to patch fast to take sites offline. Dutch government portals, Japanese services and others went dark as a precaution. PHP released 8.5.12, 8.4.27, 8.3.36 and 8.2.35 on October 21 fixing CVE-2026-109618 and CVE-2026-109619. The bugs allow unauthenticated code execution, worst on mod_php. PHP 8.1 and older get no official fix. PHP said “There are no complete mitigations, updating is the only safe choice.”

https://www.php.net/archive/2026.php

https://arstechnica.com/security/2026/10/php-maintainers-tell-web-devs-to-prepare-themselves-for-critical-security-patches/

https://lwn.net/Articles/1102014/

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