On Tuesday 12 May 2026 at 18:25 UTC, a login endpoint flood targeted a sports betting customer in Western Europe. The attack peaked at 462.8 million requests per second and lasted 111 minutes. Traffic originated from 3753 autonomous systems in 103 countries, predominantly compromised cloud VMs.
| Vector | login endpoint flood |
| Peak | 462.8 million requests per second |
| Duration | 111 min |
| Time to mitigation | 0.694 s |
| Attack traffic reaching origin | 0.090% |
| Legitimate traffic challenged | 0.07% |
Timeline
The attack was preceded by a breaking political story. Request rates on the targeted routes exceeded their hourly baseline by a factor of 622 within 6 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
Checkout conversion was unchanged compared with the same hour of the previous week.
Recommendations
- Enable authenticated origin pulls.
- Add a dedicated rate limit for the targeted route.
- Review allow-listed partner ranges quarterly.