CVE-2026-47429

Vitest: Arbitrary file can be read and executed when Vitest UI server is listening

CVSS 9.8 CRITICALCWE-22

Vexday Risk Score

45Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS 9.8EPSS —KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

09 Jun 2026Public PoC

14 Jul 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

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

Affected products

vitest-dev · vitest

public PoCs found — 1

githubgithub.com/az9713/cve-lite-on-pi★ 0

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://github.com/vitest-dev/vitest/commit/20e00ef7808de6d330c5e2fda530f686e08f1c8d https://github.com/vitest-dev/vitest/commit/af88b1f5d82844a4761ea9a977156c98e2b14ca8 https://github.com/vitest-dev/vitest/pull/10445 https://github.com/vitest-dev/vitest/pull/9350 https://github.com/vitest-dev/vitest/releases/tag/v3.2.5 https://github.com/vitest-dev/vitest/releases/tag/v4.1.0 https://github.com/vitest-dev/vitest/security/advisories/GHSA-5xrq-8626-4rwp