critical severityLangfuse Cloud (observability/tracing, prompt management, UI)
Langfuse Cloud API and UI unavailable (500 errors on requests); traces/observability data not ingested (permanently lost if 5xx); prompt management failed for new deploys; UI inaccessible for monitoring.
Root cause
Global Cloudflare outage caused their proxy (used by Langfuse for all API/UI traffic) to return 500 errors, blocking requests from reaching Langfuse AWS ALBs. Langfuse architecture created single point of failure via overreliance on Cloudflare for proxy/WAF/DNS/registrar.
LangfuseCloudflare outagedata losstracing5xx errorssingle point of failure