Critical 9.8Published Jul 14, 2026

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

Updated under an hour ago (Oct 26, 2026, 2:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for vitest-dev vitest

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

vitest-dev vitest vitest_dev:vitest (from the name)	before 3.2.5; from 4.0.0, < 4.1.0	CNA record
vitest.dev vitest vitest.dev:vitest	before 3.2.5; from 4.0.0 before 4.1.0	NVD

References

References

https://github.com/vitest-dev/vitest/security/advisories/GHSA-5xrq-8626-4rwp	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/vitest-dev/vitest/pull/10445	x-refsource-misc, exploit, issue-tracking, patch
https://github.com/vitest-dev/vitest/pull/9350	x-refsource-misc, exploit, issue-tracking, patch
https://github.com/vitest-dev/vitest/commit/20e00ef7808de6d330c5e2fda530f686e08f1c8d	x-refsource-misc, patch
https://github.com/vitest-dev/vitest/commit/af88b1f5d82844a4761ea9a977156c98e2b14ca8	x-refsource-misc, patch
https://github.com/vitest-dev/vitest/releases/tag/v3.2.5	x-refsource-misc, release-notes
https://github.com/vitest-dev/vitest/releases/tag/v4.1.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.