CVE-2026-47428 PUBLISHED

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.

• https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp
• https://github.com/vitest-dev/vitest/pull/10283
• https://github.com/vitest-dev/vitest/pull/10285
• https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06
• https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa
• https://github.com/vitest-dev/vitest/releases/tag/v4.1.6
• https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3

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