What’s Vulnerable › Vulnerabilities

CVE-2026-47429: Vitest: Arbitrary file can be read and executed when Vitest UI server is listening

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-22

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.

Affected products

• vitest-dev vitest: before 3.2.5; from 4.0.0 before 4.1.0 — fixed in 3.2.5, 4.1.0

How to fix

Upgrade to a fixed version: vitest-dev vitest 3.2.5, 4.1.0. Check the vendor advisory for mitigations.

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
• https://github.com/vitest-dev/vitest/security/advisories/GHSA-5xrq-8626-4rwp

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