Massive 11.5 Tbps UDP Flood DDoS Attack Originated From Google Cloud

Massive 11.5 Tbps UDP flood DDoS attack originated from Google Cloud, according to Cloudflare. Cloudflare disclosed that its automated defenses intercepted a record-shattering DDoS that peaked at 11.5 terabits per second and lasted 35 seconds. The majority of the attack traffic was staged through compromised resources on the Google Cloud Platform, with Cloudflare’s telemetry capturing a surge from negligible background noise to more than 11 Tbps in under 10 seconds.

The incident was characterised as a hyper-volumetric UDP flood, and mitigation involved targeted rate-limiting rules and IP-based filtering to choke off the traffic surge. Cloudflare also noted that the attack’s lifecycle showed a steep ascent to peak volume followed by an immediate descent as defenses took effect, highlighting the role of cloud-scale automation in detecting, analysing, and neutralising high-velocity assaults.

This event is described as part of a broader wave of hyper-volumetric DDoS campaigns, with others exceeding 1 Tbps and even 5.1 billion packets per second in separate UDP floods. The report underscores the evolving scale of DDoS threats and the need for real-time, automated protections.