On 2026/10/20, the PHP development team announced that there are two critical vulnerabilities in PHP, and that a fix is scheduled to be released on 2026/10/21 at 23:00 (Japan Standard Time).
Is Teachme Biz affected by this vulnerability?
No, there is no impact.
Neither Teachme Biz nor any other service in the Teachme series uses PHP, so there is no impact from this vulnerability.
[Reference]
▼[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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■Studist Vietnam
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