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What is Dev Server Exposure?

Development servers such as Vite, webpack-dev-server, and framework dev modes are built for one trusted user on localhost. Flags like --host bind them to every network interface, and a public tunnel puts them on the internet.

They are not hardened for hostile traffic. CISA lists a Vite vulnerability among known exploited vulnerabilities and notes that only dev servers exposed to the network are affected.

How LayerV Implements This

Keep the dev server on localhost and publish it with the qURL CLI. Recipients reach it through their own link, and by protocol design, requests without a session get no response.

Related

Localhost TunnelAttack Surface Reduction
Fix Vite “Blocked request. This host is not allowed” →Guide: Share a dev server with a client →Research: Developer and AI tools in CISA KEV →

Pilot LayerV

Tell us what to protect, and we’ll scope a pilot.

Enterprise starts with a scoped, paid pilot on one application, typically 60 to 90 days, credited in full toward year one if you convert within 60 days. Then an annual package sized to what you protect. Not per seat.