What it is
WebRTC is a browser technology used for real-time audio, video and peer-to-peer connections. A WebRTC leak happens when those features expose local addresses, connection candidates or routing details that reveal more network information than expected.
Why it matters
When WebRTC data conflicts with the visible public IP or network route, websites can treat the browser environment as less consistent.
How to detect it
Run a WebRTC leak check and compare the exposed addresses with your expected public IP and local network. Private LAN addresses are common, but unexpected public or routed addresses should be reviewed.
How to correct it
Review browser privacy settings, disable unnecessary WebRTC exposure, use a trusted browser profile, update extensions that manage WebRTC behavior and retest after network changes.