PHP Security Vulnerability Update

Update timeline

1. investigating Oct 21, 2026, 07:04 PM UTC

   We're actively addressing the PHP security vulnerability announced by the PHP security team. As PHP is managed at the platform level on Kinsta, fixes will be deployed automatically once validated. The patched versions of PHP 8.3 and 8.5 have now been validated and are being rolled out across our platform. If your site is already using either version and you'd like to apply the patch immediately, you can switch to a lower PHP version and then back to your original version. Updates for PHP 8.4, 8.2, 8.1, and 7.4 are still undergoing validation and will be rolled out once ready. No action is required on your end. We'll provide further updates as the rollout progresses.

2. investigating Oct 21, 2026, 08:20 PM UTC

   The following PHP versions have patches that are rolling out across our infrastructure: 8.5, 8.3, and 8.0 The following PHP versions are still undergoing validation and will be rolled out once ready: 8.4, 8.2, 8.1, and 7.4 Our Cloudflare firewall mitigations and local configuration changes to block potential exploits of these vulnerabilities are remaining in place for all sites regardless of patch status until further notice.

3. investigating Oct 21, 2026, 09:17 PM UTC

   The following PHP versions have patches that are rolling out across our infrastructure: 8.5, 8.3, 8.0, and 7.4 The following PHP versions are still undergoing validation and will be rolled out once ready: 8.4, 8.2, and 8.1 Our Cloudflare firewall mitigations and local configuration changes to block potential exploits of these vulnerabilities are remaining in place for all sites regardless of patch status until further notice.

4. investigating Oct 21, 2026, 10:06 PM UTC

   The following PHP versions have patches that are rolling out across our infrastructure: 8.5, 8.3, 8.1, 8.0, and 7.4 The following PHP versions are still undergoing validation and will be rolled out once ready: 8.4 and 8.2 Our Cloudflare firewall mitigations and local configuration changes to block potential exploits of these vulnerabilities are remaining in place for all sites regardless of patch status until further notice.

5. investigating Oct 21, 2026, 11:25 PM UTC

   The following PHP versions have patches that are rolling out across our infrastructure: 8.5, 8.3, 8.1, 8.0, 7.4, 8.2, and 8.4. Our Cloudflare firewall mitigations and local configuration changes to block potential exploits of these vulnerabilities are remaining in place for all sites regardless of patch status until further notice.

6. investigating Oct 22, 2026, 01:31 AM UTC

   The following PHP versions have patches that are rolling out across our infrastructure: 7.4, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5 Our Cloudflare firewall mitigations and local configuration changes to block potential exploits of these vulnerabilities are remaining in place for all sites regardless of patch status until further notice.