What a Cloudflare Outage Means and Why Many Sites Fail Together
A Cloudflare outage means a company that sits between visitors and many websites is having a problem, so unrelated sites can fail at the same moment. Cloudflare provides security, caching and DNS services for sites, and traffic to those sites passes through its network. When that layer breaks, visitors may see an error page even though each site’s own server is fine.
To check, use Cloudflare’s own page at cloudflarestatus.com and our live Cloudflare status page. A generic HTTP 5xx error alone does not prove Cloudflare is down.
Why do many unrelated websites break at once?
Sites that use Cloudflare route visitors through it first. If Cloudflare’s proxy software fails, every site relying on it for that traffic can return errors. Sites with no Cloudflare in front are unaffected. The same pattern applies to any shared provider, as in what happens when AWS goes down.
What did Cloudflare say about the November 18, 2025 outage?
Cloudflare published “Cloudflare outage on November 18, 2025” at blog.cloudflare.com/18-november-2025-outage. According to the post, a database access-permission change caused a query to output duplicate rows into a Bot Management feature file, roughly doubling its size. The proxy software had a limit on the number of features, the larger file exceeded it, and the software failed. Cloudflare states the outage was not caused by a cyber attack.
The post gives a start of 11:20 UTC, says users saw HTTP 5xx errors on an error page indicating a failure within Cloudflare’s network, and reports that systems were functioning normally as of 17:06 UTC. We repeat only the figures in Cloudflare’s own report.
How do I check whether Cloudflare is down?
- Open cloudflarestatus.com. Its overview shows Active Incidents and Scheduled Maintenance, with pages for services, locations and history. Cloudflare’s note says an incident may affect only specific products or regions.
- Check our Cloudflare status page.
- Look at the error page itself. Cloudflare-branded error pages usually name Cloudflare and show a code; see Cloudflare error codes.
- Try a few unrelated sites. If several fail with similar errors, a shared provider is likely.
- Try again from mobile data to rule out your network, as in is it down or just me.
What can a visitor do?
Cloudflare’s support documentation says that if you are a site visitor, you should report the problem to the site owner, since support helps domain owners. In practice, wait, avoid repeating payments, and retry later. If a site asks you to install something to “fix” the error, close it. See what to do during an outage.
| What you see | Likely meaning |
|---|---|
| Many unrelated sites show 5xx errors | A shared provider may have a fault |
| One site only shows an error | That site’s server or settings |
| cloudflarestatus.com lists an active incident | Cloudflare-confirmed problem |
| Error works on mobile data | Your network |
What is Cloudflare and why do so many sites use it?
Cloudflare is a company that offers a network in front of websites. Site owners use it for security checks, caching so pages load faster, and DNS, the system that turns site names into addresses. The owner points the domain to Cloudflare, and visitors reach the site through Cloudflare’s servers instead of reaching the site’s own server directly.
That arrangement is useful on normal days, because Cloudflare can block malicious traffic and serve cached copies. It also means Cloudflare is a single point many sites share. If something in Cloudflare’s own software fails, the visitor sees an error, and the site’s owner may not be able to fix it.
What do the error pages look like?
During a Cloudflare-side fault, visitors typically see an HTTP 5xx error. In its November 18 report, Cloudflare describes an error page indicating a failure within Cloudflare’s network. In other cases, Cloudflare’s documentation says a 500 usually points to a problem at the site’s origin server, and that for 502 and 504 errors a Cloudflare-branded page suggests the error came from the origin. Those distinctions matter: a 5xx alone does not show whose side failed, and Cloudflare error codes explains the individual pages.
How can I tell Cloudflare is back?
Watch the status page. An incident moves through states such as investigating, identified and monitoring before it is resolved; the meaning of each is in how to read a status page. When the incident shows as resolved, reload the affected site. If an error remains, your browser may be holding a cached copy of the error page, so try a private window. If your device still cannot reach the site, flushing the DNS cache can help (see how to flush the DNS cache), though that is rarely needed after a provider-side outage.
What should site owners and readers keep in mind afterward?
Cloudflare’s November 18 post is the source for what happened, including its stated cause and its timeline. Third-party summaries can differ on times and details, so compare any figure you read elsewhere against the post. If a news story or social media post gives a number that Cloudflare’s report does not, treat it as unconfirmed. For a service you rely on, subscribe to its official status notifications so you hear about incidents from the source. Cloudflare’s status page has a Notifications section for subscriptions.
Bottom line
A Cloudflare outage is a shared-provider failure. Confirm it on Cloudflare’s status page, rely on Cloudflare’s own incident reports for facts, and wait it out.
FAQ
Does Cloudflare down mean the internet is down?
No. Only sites that route traffic through the affected Cloudflare services are affected.
Was the 2025 outage a hack?
Cloudflare’s report says it was not a cyber attack.
Why did I see an error but the site’s owner did not?
The owner’s server may be fine while the layer in front fails. The owner can check Cloudflare’s dashboard.