CVE-2026-47429 Vitest: Arbitrary file can be read and executed when Vitest UI server is listening

Vitest is a testing framework powered by Vite. Prior to 3.2.5 and 4.1.0, the Vitest UI/API server on Windows used isFileServingAllowed incorrectly for /vitestattachment, allowing \?\..\ path traversal to read files outside the project; exposed API write and rerun features such as saveTestFile...

GHSA-5XRQ-8626-4RWP When Vitest UI server is listening, arbitrary file can be read and executed

Summary Arbitrary file can be read on Windows when Vitest UI server is listening, especially when exposed to the network. Impact Only users that match either of the following conditions are affected: - explicitly exposes the Vitest UI server to the network using --api.host or api.host config opti...