Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdf
- https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351f
- https://github.com/vitest-dev/vitest/pull/10283
- https://github.com/vitest-dev/vitest/pull/10285
- https://github.com/vitest-dev/vitest/releases/tag/v4.1.6
- https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp
FAQ
What is CVE-2026-47428?
CVE-2026-47428 is a vulnerability with a CVSS score of 9.6 (CRITICAL). 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 inl...
How severe is CVE-2026-47428?
CVE-2026-47428 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-47428?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.