image source: https://blog.cloudflare.com
On 18 November 2025, Cloudflare experienced a significant outage that briefly disrupted access to many websites and applications worldwide. During this period, visitors to affected sites saw error pages and 5xx error codes, even though the underlying application servers were healthy. Because Cloudflare sits in front of a large portion of the internet as a security and performance layer, the impact appeared global and simultaneous.
According to Cloudflare’s own technical explanation, the incident began with an internal configuration and software issue in their bot management systems. Cloudflare regularly updates a configuration file that contains signals used to identify and filter automated traffic (bots). A change in how this internal data was generated caused the configuration file to grow beyond the size limits that their edge proxy software was designed to handle. When the oversized configuration was rolled out globally, many of Cloudflare’s edge servers crashed as they tried to load it, resulting in widespread 5xx errors and connection failures.
Cloudflare engineers isolated the issue, stopped distributing the problematic configuration, restored a known-good version, and restarted affected components. Once this rollback was completed across their global network, traffic gradually returned to normal. Importantly, this event was the result of an internal software and configuration bug, not a cyberattack or security breach.
During the outage window, some of our clients’ websites and applications became temporarily inaccessible through normal web browsers. In most cases, visitors saw Cloudflare-branded error pages rather than the usual site content. Behind the scenes, however, our origin servers, applications, and databases continued to run normally. The problem was in the network layer between users and our systems, the Cloudflare edge, not in our own infrastructure.
image source: https://blog.cloudflare.com
There is no indication that customer data was exposed or compromised during this incident. Once Cloudflare completed their remediation steps and restored their network, our clients’ websites automatically started serving traffic again without any changes needed on your side.
It is reasonable to ask why we rely on Cloudflare when a single incident can have visible impact across so many services. The reality is that Cloudflare provides an extensive set of protections and performance benefits that are extremely difficult and costly to replicate on a per-site basis. For our clients, Cloudflare is a critical part of how we keep websites fast, secure, and resilient on a day-to-day basis.
Key benefits Cloudflare provides to our infrastructure include:
- A global Content Delivery Network (CDN) that caches static assets close to users around the world, reducing latency and improving loading times.
- A powerful Web Application Firewall (WAF) that helps block common web attacks and malicious traffic before it reaches our servers.
- DDoS mitigation that can absorb and deflect very large traffic floods that would otherwise overwhelm origin infrastructure.
- Smart routing and optimizations that improve reliability and performance across congested or unstable networks.
Incidents like the November 18 outage are headline-grabbing precisely because Cloudflare is involved in such a large share of global internet traffic. However, viewed over a longer time frame, the overall reliability and security improvements from using Cloudflare significantly outweigh the rare disruption caused by an internal issue like this.
This event is also a reminder of how interconnected and, in some ways, fragile the modern internet is. A relatively small number of core providers, content delivery networks, cloud platforms, DNS providers, and security layers, sit underneath millions of websites and applications. When one of these layers develops a problem, the effects can ripple across many different services at once.
This does not mean the internet is broken or unreliable. Instead, it highlights the complexity of the systems that keep everything running and the importance of constant monitoring, testing, and learning from incidents. Even the most advanced providers occasionally discover edge cases and bugs only when they are exercised at real-world scale.
From our side, we treat incidents like this very seriously. Our team actively monitored the situation while it was unfolding, verified that our own infrastructure remained healthy, and tracked Cloudflare’s progress as they rolled out their fix globally. We also reviewed the post-incident communication from Cloudflare to understand the root cause and the steps they are taking to prevent a recurrence.
Going forward, we continue to refine our own resilience strategies. This includes strengthening our monitoring and alerting so we can quickly distinguish between upstream provider issues and application-level problems, reviewing options for alternative access paths where appropriate, and maintaining clear communication processes so our clients know what is happening, why it is happening, and what to expect.
Reassurance for Our Clients
For our clients, the key takeaway is that your data and core systems remained safe throughout this incident. The disruption you may have seen was caused by a temporary failure in a global edge network layer, not by any compromise of your applications or databases. Cloudflare has already taken steps to address the underlying issue, and we continue to believe that using Cloudflare is the right choice to provide strong security, performance, and reliability for your online presence.
We understand that any downtime, even for reasons outside your direct control, can be stressful. Our goal is to keep you informed, protected, and supported, not only when everything is running smoothly, but also during the rare moments when critical internet infrastructure has a bad day. If you have any questions about this incident or about how your own setup is designed, our team is always available to walk you through the details.
If you wish you can read the official cloudflare statement in their blog here.
