Vitest fixes arbitrary file exposure, code execution, and XSS issues

Vitest’s API and UI modes exposed arbitrary files, allowed arbitrary execution, and had an otelCarrier XSS bug, making the update immediately relevant to many JS projects

We are publishing Vitest 4.1.6 and Vitest 5.0.0-beta.3 to resolve recent vulnerabilities: - `--api` and `--ui` exposed arbitrary files to the network - `--api` allowed arbitrary execution - `?otelCarrier` XSS More information on our Git

Ranked #5 on backlist 2026-05-19 (19 May 2026 UTC) · by @vitest_dev (Vitest) · view on X ↗

How it ranks: Backlist reads my Twitter/X timeline, scores every tweet for substance with an LLM rubric (not engagement), and publishes the daily top picks with a one-line takeaway. Curated by Surya Dantuluri.