Cloudflare outage on December 5, 2025
Cloudflare's 25-minute traffic outage on December 5, 2025, resulted from configuration changes addressing a React Server Components vulnerability, not an attack.
MAIN POINTS
- Outage began at 8:47 UTC on December 5, 2025.
- Incident lasted approximately 25 minutes.
- Caused by configuration changes, not a cyber attack.
- Aimed to mitigate a vulnerability in React Server Components.
TAKEAWAYS
- Cloudflare's outage was an unintended consequence of security measures.
- The incident highlights the complexity of managing industry-wide vulnerabilities.
- Quick resolution of the issue minimized prolonged disruptions.
- Importance of careful configuration management in cloud services.