Webdriver Tampering

Detection approach

navigator.webdriver is writable. On a genuine browser this property is read-only or undefined. A writable property proves the environment has been tampered with by an automation framework or a poorly configured stealth plugin.

How this helps detect bots

Collect this signal alongside session context, request metadata, and other independent indicators. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.

Legitimate traffic to consider

None. On genuine human browsers, this property is read-only or undefined.