CVE-2026-112949
Vitest: Code injection via unauthenticated manual mock registration
- State
- Published
- Severity
- 4.7 Medium
- Published
- Oct 20, 2026
- Updated
- Oct 23, 2026
- Reserved
- Oct 19, 2026
Description
Vitest 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.7 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
vitestvitest-dev |
|
mocker@vitest |
|
References
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8
- https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35
- https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473
- https://github.com/vitest-dev/vitest/releases/tag/v4.1.12
- https://github.com/vitest-dev/vitest/releases/tag/v5.0.3
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