On Saturday 7 June 2025 at 23:36 UTC, a HTTP POST flood targeted a healthcare portal customer in the Middle East. The attack peaked at 973.3 million requests per second and lasted 107 minutes. Traffic originated from 3817 autonomous systems in 91 countries, predominantly compromised cloud VMs.
| Vector | HTTP POST flood |
| Peak | 973.3 million requests per second |
| Duration | 107 min |
| Time to mitigation | 0.789 s |
| Attack traffic reaching origin | 0.028% |
| Legitimate traffic challenged | 0.65% |
Timeline
The attack was preceded by a competitor’s product launch. Request rates on the targeted routes exceeded their hourly baseline by a factor of 685 within 7 seconds. The risk score of participating clients crossed the challenge threshold automatically and proof-of-work difficulty rose with origin load.
What the customer saw
No customer-visible impact. The on-call engineer was notified and acknowledged the incident from the dashboard.
Recommendations
- Keep origin IPs out of public DNS history.
- Review allow-listed partner ranges quarterly.
- Enable authenticated origin pulls.