Has IONOS patched the October 2026 PHP vulnerability?
Says it has patched
IONOS has publicly stated that it patched PHP for CVE-2026-109618 and CVE-2026-109619.
“IONOS has already applied the official update on all platforms the company operates itself.”
What IONOS says you should do
Nothing on IONOS-operated platforms. If you run PHP yourself on a VPS or dedicated server they say to install the update right away.
No publication date appears anywhere on this page. The claim covers Web Hosting, Managed WordPress, MyWebsite 8, Managed Nextcloud and HiDrive Next — note the wording covers platforms IONOS operates itself, which excludes customer-run servers.
How to check your own site, whatever your host has said
A host’s announcement covers their fleet. The only thing that tells you about your site is your site. In WordPress:
- Log in to WordPress.
- Go to Tools → Site Health.
- Open the Info tab.
- Expand Server. PHP version is the first line.
The fix shipped in PHP 8.2.35, 8.3.36, 8.4.27 and 8.5.12. A version below those does not automatically mean you are exposed — hosts and Linux distributions routinely apply the patch without changing the version number.
Check what your site reports
We load your homepage once and read what it publishes. Most servers hide their PHP version, which is correct of them — so this often comes back empty, and the result tells you where to look instead.
No signup. We load your homepage once — the same single request any visitor makes — and report what it tells us. Nothing else on your site is touched.
Common questions
Has IONOS patched CVE-2026-109618?
IONOS has publicly stated that it patched PHP for this issue. Their own page is linked on this page so you can read the wording yourself.
How do I check what PHP version my IONOS site is running?
In WordPress, go to Tools → Site Health → Info → Server. The PHP version is the first line, and you need no cPanel, FTP or SSH access for it. Most hosts also show the PHP version somewhere in their own control panel, and let you change it there.
My site reports a PHP version below the fix. Does that mean it is vulnerable?
Not necessarily. Hosts and CloudLinux routinely apply security patches to older releases without changing the version number, so a server can report an older version and already have the fix. The version string records what was printed, not what was patched. Your host's support can confirm it definitively.
Other hosts
This page records what IONOS has published, not our own assessment of their infrastructure. We cannot see inside any host. Last checked — if IONOS has published something since, their own site is the authority.