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Critical PHP vulnerabilities: What you need to know and do

Critical PHP vulnerabilities: What you need to know and do

Security status update for Layershift customers

Last updated: 24 October 2026, 18:47

What happened?

On 21 October, the PHP development team released emergency fixes for two critical vulnerabilities (php2shell), CVE-2026-109618 and CVE-2026-109619, both rated 9.2 out of 10.

These vulnerabilities could allow attackers to execute malicious code on affected servers without logging in. PHP powers WordPress, WooCommerce and many other websites and applications.

The fixed upstream versions are PHP 8.2.35, 8.3.36, 8.4.27 and 8.5.12.

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