On 2026/10/20, the PHP development team announced that there are two critical vulnerabilities in PHP, and that a fixed version is scheduled to be released on 2026/10/21 at 23:00 (Japan Standard Time).
Is Teachme MySkill affected by this vulnerability?
No, it is not affected.
Teachme MySkill and none of the other Teachme series services use PHP, so there is no impact from this vulnerability.
[Reference Information]
▼[Advance Notice] Upcoming PHP Security Release (External Site)
https://www.ipa.go.jp/security/security-alert/2026/pre-alert20261021.html
▼Upcoming Critical PHP Security Release (External Site)
https://www.php.net/archive/2026.php#2026-10-20-1
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