Threat Bulletin 1337: login endpoint flood against a video streaming platform in the UK

On Thursday 9 April 2026 at 16:19 UTC, a login endpoint flood targeted a video streaming customer in the UK. The attack peaked at 635.4 million requests per second and lasted 27 minutes. Traffic originated from 3439 autonomous systems in 108 countries, predominantly a rented booter service.

Vector login endpoint flood
Peak 635.4 million requests per second
Duration 27 min
Time to mitigation 0.012 s
Attack traffic reaching origin 0.028%
Legitimate traffic challenged 0.06%

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 555 within 39 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

  • Enable log streaming to your SIEM for faster correlation.
  • Review allow-listed partner ranges quarterly.
  • Enable authenticated origin pulls.

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