PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 out
PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 fix two critical vulnerabilities that can allow unauthenticated remote code execution. All PHP users are strongly encouraged to update immediately.
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PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 fix two critical vulnerabilities that can allow unauthenticated remote code execution. All PHP users are strongly encouraged to update immediately.
Who is at risk: all PHP installations serving web requests, including PHP-FPM, Apache with mod_php, php-cgi, FrankenPHP and LiteSpeed. We consider the risk highest for mod_php, with a demonstrated exploit where an unauthenticated request can trigger the attack before any application code runs.
If you cannot update immediately: while only an update is a complete solution, the following measures reduce exposure to specific attack paths but do not make an installation safe.
RCE via OOM corruption (CVE-2026-109618):
RCE via stale global state (CVE-2026-109619):
The advisories linked above have the full technical details.
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