Cloudflare Outage on December 5, 2025
Cloudflare experienced a service outage on December 5, 2025, from 08:47 to 09:12 UTC, affecting 28% of HTTP traffic due to internal changes while addressing a security vulnerability in React. The incident was not caused by a cyber attack. The issue arose from configuration changes that led to HTTP 500 errors, impacting customers using specific setups with the older FL1 proxy. Cloudflare is implementing measures to prevent future incidents, including enhanced rollout protocols and improved error handling. An apology was issued acknowledging the disruption caused.













