4.7Medium
CVE-2026-112949Vitest: Code injection via unauthenticated manual mock registration
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| @vitest | mocker | >= 2.1.0-beta.7, < 4.1.12, >= 5.0.0, < 5.0.3 | |
| vitest-dev | vitest | >= 2.1.0-beta.7, < 4.1.12, >= 5.0.0, < 5.0.3 |
References and patches
- 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