cisa/regulator
CISA urges immediate patching of "php2shell" PHP flaws
CISA issued an alert on two critical PHP remote code execution flaws, CVE-2026-109618 and CVE-2026-109619, tracked as "php2shell." They affect every PHP installation serving web requests, and CISA has not observed exploitation as of publication. Patches are 8.5.12, 8.4.27, 8.3.36, and 8.2.35; organizations that can't update immediately, or that run PHP 8.1 or earlier, should take those PHP systems offline until patched.