CLOUDFLARE OUTAGE ON NOVEMBER 18, 2025

Summary from the TLDR Dev newsletter

Cloudflare had a large outage yesterday due to a faulty configuration file in its Bot Management system, which was triggered by a database permissions change. This larger-than-expected file overloaded the network's traffic routing software, resulting in widespread HTTP 5xx errors and impacting services like Turnstile, Workers KV, and Access. The issue was not a cyber attack. The team was able to resolve it by stopping the faulty file propagation and restoring an earlier version, bringing systems back to normal by 17:06 UTC.