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Fencer Vulns
critical 9.8

CVE-2026-47429 json

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

published 2026-06-01 5 mo ago modified 2026-10-24 15 d ago also GHSA-5xrq-8626-4rwp , EUVD-2026-44391

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm vitest 3.2.6, 4.1.0
  • vitest.dev vitest 3.2.5, 4.1.0
  • prometheus3.13 hummingbird 1 3.13.1-0.1.hum1

red hat advisories RHSA-2026:39058

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47429 updated cvss 8.1

vitest: Vitest: Arbitrary code execution and information disclosure via path traversal

  • Red Hat Hardened Images prometheus3.13 3.13.1-0.1.hum1
    fixed: vendor fix RHSA-2026:39058
  • Red Hat AMQ Broker 7 vitest Red Hat Ansible Automation Platform 2 automation-platform-ui, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-27/gateway-rhel9 Red Hat Build of Keycloak vitest Red Hat Build of Podman Desktop rh-podman-desktop.git Red Hat JBoss Enterprise Application Platform 8 vitest Red Hat JBoss Enterprise Application Platform Expansion Pack vitest
    +2 more products
    Red Hat OpenShift Container Platform 4 openshift4/ose-agent-installer-ui-rhel9 Red Hat OpenShift Container Platform 5 openshift5/ose-agent-installer-ui-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/vitest-dev/vitest/pull/10445 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/vitest-dev/vitest/pull/9350 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/vitest-dev/vitest/security/advisories/GHSA-5xrq-8626-4rwp referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm vitest
>=4.0.0, <4.1.0
<3.2.6
4.1.0
3.2.6

Affected products

  • vitest-dev vitest

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-862 Missing Authorization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.