Cloud Incidents — April 21, 2026
All incidents from major cloud and AI providers on this date.
Cross-Provider Correlation Detected
Multiple providers experienced incidents within a 2-hour window on this date. This may indicate shared infrastructure issues or broader internet events.
Concurrent window
minor
OpenAI
— Some users may encounter issues with GPT-5.4-C model in Codex
2026-04-21 02:34 UTC
minor
Cloudflare
— Issues with Cloudflare One Appliance, Cloudflare Tunnel, and Cloudflare Mesh connections on 2026-04-21
2026-04-21 03:00 UTC
Concurrent window
minor
Cloudflare
— Cloudflare Access Availability Issues
2026-04-21 12:58 UTC
minor
Vercel
— Elevated errors on Vercel Dashboard
2026-04-21 13:51 UTC
Concurrent window
minor
Cloudflare
— Log Explorer Issues
2026-04-21 15:02 UTC
minor
GitHub
— Disruption with projects service
2026-04-21 15:03 UTC
minor
OpenAI
resolved
Some users may encounter issues with GPT-5.4-C model in Codex
Started: 2026-04-21 02:34 UTC
Duration: 119m
minor
Cloudflare
resolved
Issues with Cloudflare One Appliance, Cloudflare Tunnel, and Cloudflare Mesh connections on 2026-04-21
Started: 2026-04-21 03:00 UTC
Duration: 68m
minor
Cloudflare
resolved
Increased HTTP 5xx Errors in Sydney
Started: 2026-04-21 03:25 UTC
Duration: 211m
minor
Cloudflare
resolved
Degraded network performance for some users around Dallas, Texas
Started: 2026-04-21 04:58 UTC
Duration: 29m
minor
Cloudflare
resolved
Cloudflare Access Availability Issues
Started: 2026-04-21 12:58 UTC
Duration: 879m
minor
Vercel
resolved
Elevated errors on Vercel Dashboard
Started: 2026-04-21 13:51 UTC
Duration: 50m
minor
Cloudflare
resolved
Log Explorer Issues
Started: 2026-04-21 15:02 UTC
Duration: 106m
minor
GitHub
resolved
Disruption with projects service
Started: 2026-04-21 15:03 UTC
Duration: 621m
minor
Cloudflare
resolved
Cloudflare Pages build issues
Started: 2026-04-21 15:46 UTC
Duration: 141m
minor
Cloudflare
resolved
Network Performance Issues in Seattle, Washington
Started: 2026-04-21 16:03 UTC
Duration: 120m
minor
Cloudflare
resolved
Unavailability of Sampled Logs and Suspicious Activity in Security Analytics
Started: 2026-04-21 16:48 UTC
Duration: 0m
minor
Cloudflare
resolved
Investigating potential impact to Realtime services in Bombay
Started: 2026-04-21 17:46 UTC
Duration: 224m
minor
Cloudflare
resolved
Page Rules with Host Header Override issues
Started: 2026-04-21 18:09 UTC
Duration: 130m
minor
Cloudflare
resolved
Cloudflare Gateway HTTP Logs issues
Started: 2026-04-21 19:36 UTC
Duration: 107m