Vitest browser mode serves unsanitized otelCarrier query parameter as inline script

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Summary

CVECVE-2026-47428
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-14 20:17:02 UTC
Updated2026-07-14 20:17:02 UTC
DescriptionVitest 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.

Risk And Classification

Primary CVSS: v3.1 9.6 CRITICAL from [email protected]

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

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.6CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
3.1CNADECLARED9.6CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Vitest-dev Vitest affected >= 4.0.17, < 4.1.6 Not specified
CNA Vitest-dev Vitest affected >= 5.0.0-beta.0, < 5.0.0-beta.3 Not specified

References

ReferenceSourceLinkTags
github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdf... [email protected] github.com
github.com/vitest-dev/vitest/pull/10283 [email protected] github.com
github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3 [email protected] github.com
github.com/vitest-dev/vitest/pull/10285 [email protected] github.com
github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351f... [email protected] github.com
github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp [email protected] github.com
github.com/vitest-dev/vitest/releases/tag/v4.1.6 [email protected] github.com
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