PHP2Shell (CVE-2026-109618 / CVE-2026-109619): fixed in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35. How to update

PHP2Shell Outages: Which Websites Went Offline

On October 21, 2026, government portals, game publishers and online services took websites offline because of PHP2Shell. This list covers the PHP2Shell outages reported by the organisations themselves or by news outlets. Almost all were precautionary shutdowns while PHP was updated, not hacks.

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Why PHP2Shell caused outages

The details of PHP2Shell (CVE-2026-109618 and CVE-2026-109619) leaked a day before the planned release. With patches not yet out, the UK NCSC told operators to consider taking systems offline if they could not protect them, and CERT-EU advised isolating internet-facing applications that could not be patched. Many organisations chose to pause their sites rather than run an unpatched PHP version during that window.

PHP2Shell outages in the Netherlands

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PHP2Shell outages in the rest of Europe

Games and online services hit by PHP2Shell downtime

PHP2Shell emergency maintenance in Japan

Official PHP2Shell advisories

AgencyAdvice
CERT-EU (Advisory 2026-018)Patch now; isolate internet-facing applications that cannot be patched
UK NCSCUpdate PHP; take systems offline if mitigations cannot be applied; check for compromise
NCSC-NLPublic GitHub repository listing PHP-dependent software and guidance
US NSA"PHP Updates" advisory
Germany (BSI), Japan, Australia (ASD)Warnings urging operators to patch
CISANot on the Known Exploited Vulnerabilities list when checked

Is your site safe?

Whether your site stayed online says nothing about its PHP version. Run the PHP2Shell checker, then follow the patch guide. For background, see what PHP2Shell is.

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PHP2Shell outages FAQ

Were these websites hacked?

Almost all of them went offline as a precaution while they updated PHP, not because of a confirmed breach. Dutch coverage described the shutdowns as a precaution, not the result of a hack.

Why did governments take websites offline?

The vulnerability details leaked before patches were available. The UK NCSC advised taking systems offline if they could not be protected, and several national CERTs urged immediate action, so many public bodies paused their sites until PHP was updated.

Was Steam taken down by PHP2Shell?

We could not find a statement from Valve or a news report that links a Steam outage to PHP2Shell, so it is not on this list.

How should a site go offline without hurting SEO?

Google's John Mueller advised returning HTTP 503 during planned downtime rather than letting requests time out or show errors. A short 503 period normally does not affect rankings.

When will the sites come back?

Most services returned within hours to a day, once their PHP runtimes were updated. Check each service's own status page.