CPU Concurrency Lie

Detection approach

navigator.hardwareConcurrency reports 0 or >128 cores. Values in this range are impossible on consumer hardware and indicate an emulated environment, server farm, or tampered navigator object.

How this helps detect bots

This signal is assessed with other independent session, browser, and network evidence. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.

Legitimate traffic to consider

Users running high-end multi-socket servers, server host environments, or developer rigs.