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CRITICAL

CVE-2026-47429

CVSS v3

9.8

CRITICAL

EPSS Score

1.0 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

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.

Technical details

CVSS v3 Vector
3.1
Published
2026-07-14
Last Modified
2026-07-15

Frequently asked questions

What is CVE-2026-47429?

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.

Is CVE-2026-47429 actively exploited?

Active exploitation of CVE-2026-47429 has not been confirmed. The EPSS score is 1.0%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-47429?

CVE-2026-47429 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.

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