Vitest: Code injection via unauthenticated manual mock registration

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-112949
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-20 16:17:05 UTC
Updated2026-10-20 19:56:45 UTC
DescriptionVitest is a Vite-native testing framework for JavaScript and TypeScript projects. From 2.1.0-beta.7 until 4.1.12 and 5.0.3, an unauthenticated non-browser WebSocket client that can reach a development server using interceptorPlugin can register a manual mock whose attacker-controlled url createManualModuleSource inserts unescaped into generated module source. When the developer browser loads the affected module, attacker-controlled JavaScript executes on the development-server origin. This issue is fixed in versions 4.1.12 and 5.0.3.

Risk And Classification

Primary CVSS: v3.1 4.7 MEDIUM from [email protected]

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

Problem Types: CWE-94 | CWE-116 | CWE-306 | CWE-94 CWE-94: Improper Control of Generation of Code ('Code Injection') | CWE-116 CWE-116: Improper Encoding or Escaping of Output | CWE-306 CWE-306: Missing Authentication for Critical Function

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.7MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED4.7MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Vitest-dev Vitest affected >= 2.1.0-beta.7, < 4.1.12 Not specified
CNA Vitest-dev Vitest affected >= 5.0.0, < 5.0.3 Not specified
CNA @vitest Mocker affected >= 2.1.0-beta.7, < 4.1.12 Not specified
CNA @vitest Mocker affected >= 5.0.0, < 5.0.3 Not specified

References

ReferenceSourceLinkTags
github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8 [email protected] github.com
github.com/vitest-dev/vitest/releases/tag/v5.0.3 [email protected] github.com
github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e1... [email protected] github.com
github.com/vitest-dev/vitest/releases/tag/v4.1.12 [email protected] github.com
github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751... [email protected] github.com
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