Cloudflare outage on November 18, 2025

[Rui Carlos]

Citação

On 18 November 2025 at 11:20 UTC (all times in this blog are UTC), Cloudflare's network began experiencing significant failures to deliver core network traffic. This showed up to Internet users trying to access our customers' sites as an error page indicating a failure within Cloudflare's network.

[...]

After we initially wrongly suspected the symptoms we were seeing were caused by a hyper-scale DDoS attack, we correctly identified the core issue and were able to stop the propagation of the larger-than-expected feature file and replace it with an earlier version of the file. Core traffic was largely flowing as normal by 14:30. We worked over the next few hours to mitigate increased load on various parts of our network as traffic rushed back online. As of 17:06 all systems at Cloudflare were functioning as normal.

[...]

Fonte: https://blog.cloudflare.com/18-november-2025-outage/