I'm checking by ssh'ing into my environment, and this is what I see as of 21:41 UTC, several hours after the patches were published:
wpe-user@MYENVIRONMENT.ssh.wpengine.net:~$ php -v
PHP 8.4.26 (cli) (built: Sep 23 2026 06:24:29) (NTS)
Copyright (c) The PHP Group
Built by Perforce Zend (www.zend.com)
Zend Engine v4.4.26, Copyright (c) Zend Technologies
with Zend OPcache v8.4.26, Copyright (c), by Zend Technologies
I keep hoping for either a change in the version or the build date, but nothing yet. The incident status page says they're deploying, but there haven't been further updates about how far along they are.