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 /__vitest_attachment__, allowing \\?\\..\\ path traversal to read files outside the project; exposed API write and rerun features such as saveTestFile and rerun could also allow arbitrary script execution. This issue is fixed in versions 3.2.5 and 4.1.0.

Affected

vitest-dev · vitest

CVSS v3.1 NVD

5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 GITHUB

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.88% chance of exploitation in the next 30 days, 58th percentile

Published

2026-07-14

Updated

2026-07-21

Proof-of-concept exploits (1)

• advisories/GHSA-5xrq-8626-4rwp

Security advisories

• vitest-dev/vitest/security/advisories/GHSA-5xrq-8626-4rwp
• vitest-dev/vitest/pull/9350

References

• CVE Record
• NVD entry