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CVE-2026-71319 is a critical remote code execution vulnerability in Nuxt DevTools affecting versions prior to 3.3.1. In development mode, the nuxt:devtools:rpc plugin exposes a bidirectional RPC channel over the Vite HMR WebSocket without authentication, token validation, handshake enforcement, or origin checks before the channel is established. Several RPC methods, including updateOptions(), clearOptions(), and openInEditor(), do not enforce the ensureDevAuthToken protection used by other mutating methods. The flaw becomes exploitable because openInEditor() reads the persisted behavior.openInEditor setting and passes it to the launch-editor package, which spawns it as a child process. An attacker able to reach the HMR WebSocket can therefore use the unauthenticated updateOptions() method to set behavior.openInEditor to an arbitrary command and then invoke openInEditor() with an existing file argument, resulting in arbitrary program execution on the developer workstation. The issue affects development environments rather than production deployments and was fixed in Nuxt DevTools 3.3.1.
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