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Description

Vitest is a testing framework powered by Vite. From 4.0.17 until 4.1.6 and 5.0.0-beta.3, Vitest Browser Mode served /__vitest_test__/ with the otelCarrier query parameter inserted directly into an inline module script, allowing a crafted browser-runner URL to execute arbitrary JavaScript in the Vitest server origin and recover VITEST_API_TOKEN for authenticated API calls. This issue is fixed in versions 4.1.6 and 5.0.0-beta.3.

PUBLISHED Reserved 2026-05-19 | Published 2026-07-14 | Updated 2026-07-14 | Assigner GitHub_M




CRITICAL: 9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

>= 4.0.17, < 4.1.6
affected

>= 5.0.0-beta.0, < 5.0.0-beta.3
affected

References

github.com/...vitest/security/advisories/GHSA-2h32-95rg-cppp

github.com/vitest-dev/vitest/pull/10283

github.com/vitest-dev/vitest/pull/10285

github.com/...ommit/18af98cee1830604d57f6a02bf28f8067cdffc06

github.com/...ommit/3514f9fa135c90e1c35754fc4d27c9cf351faafa

github.com/vitest-dev/vitest/releases/tag/v4.1.6

github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3

cve.org (CVE-2026-47428)

nvd.nist.gov (CVE-2026-47428)

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