A widespread technical issue at Cloudflare caused significant disruption to numerous websites on Tuesday, including X (formerly Twitter), ChatGPT, and Letterboxd. Users attempting to access these sites encountered error messages indicating an internal server error on Cloudflare's network, with a prompt to try again later.
Cloudflare, a major internet infrastructure provider offering security and performance services, acknowledged the problem in a statement: “Cloudflare is aware of, and investigating an issue which potentially impacts multiple customers. Further detail will be provided as more information becomes available.” The outage also affected outage-tracking site Down Detector, which showed a sharp spike in reported problems.
Alan Woodward, professor of cybersecurity at the University of Surrey, commented on the incident: “The downside of being a gatekeeper and distribution network for such big brands is that if this vital system fails, no one can use your service be that website or app. It’s still not clear exactly what went wrong but it looks like it was a technical malfunction within Cloudflare network. This in itself is surprising as such networks are designed to avoid single points of failure.”
Cloudflare provides services to approximately one-fifth of all global websites, including tools to protect against cyber attacks and manage high traffic. The company had scheduled maintenance for its Santiago data centre on the same day, though it is unclear if this was related to the outage.
By the evening, Cloudflare reported that services were “fully operational” again. Chief Technology Officer Dane Knecht stated: “Sharing an update on the recovery of our services. We were able to resolve the impact to traffic flowing through our network at approximately 14:30 UTC, which was our first priority, but the incident required some additional work to fully restore our control plane. The control plane should now be fully operational.” The company said no configuration changes were being made and that a deeper investigation into the disruption is ongoing.
Lee Skillen, CTO of Cloudsmith, warned that such outages may become more frequent: “Modern infrastructure is built on deeply interconnected systems; the more we optimise for scale, the more challenging it becomes to pinpoint how one failure cascades into another. Will this happen more frequently? The short answer is yes. Expect things to fail.”
