CVE-2026-73653: Vitest-Dev Vitest

Critical severity, CVSS 9.4. EPSS: 0.8% chance of exploitation in the next 30 days.

Vitest is a testing framework powered by Vite. Prior to versions 3.2.7, 4.1.10, and 5.0.0-beta.6, Browser Mode provider commands including upload, takeScreenshot, screenshotMatcher, stopChunkTrace, deleteTracing, and annotateTraces accept browser-supplied file paths without enforcing the allowWrite permission gate or confining paths to the project root. A client that can reach the Browser Mode API can read arbitrary local files, create or overwrite image and trace files, or delete files accessible to the Vitest process even when allowWrite is false. This issue is fixed in versions 3.2.7, 4.1.10, and 5.0.0-beta.6.

Affected products

• Vitest-Dev Vitest: before 3.2.7 (fixed in 3.2.7); from 4.0.0, before 4.1.10 (fixed in 4.1.10); from 5.0.0-beta.1, before 5.0.0-beta.6 (fixed in 5.0.0-beta.6)

Published 2026-08-13. Last modified 2026-09-09.