CVE-2026-47428
Vitest browser mode serves unsanitized otelCarrier query parameter as inline script
CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | vitest-dev |
| Product | vitest |
| Published | Jul 14, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
vitest-dev / vitest
>= 4.0.17, < 4.1.6 >= 5.0.0-beta.0, < 5.0.0-beta.3
References
github.com: https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp github.com: https://github.com/vitest-dev/vitest/pull/10283 github.com: https://github.com/vitest-dev/vitest/pull/10285 github.com: https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06 github.com: https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa github.com: https://github.com/vitest-dev/vitest/releases/tag/v4.1.6 github.com: https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3