Route leak incident on January 22, 2026
Summary
Cloudflare details a route leak incident on January 22, 2026 caused by an automated routing policy misconfiguration at a Miami data center. The IPv6 prefixes were inadvertently redistributed to peers and providers for 25 minutes, causing congestion and elevated latency, with some traffic dropped by firewall rules. The post covers the root cause, timeline, impact, and recommended mitigations including policy fixes, safeguards, CI/CD checks, RFC9234 validation, and ASPA adoption.