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CVE-2026-112949

CVE-2026-112949 · Vitest: Code injection via unauthenticated manual mock registration

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 4.7 · Medium · EPSS 0.2% · Public exploit · Fix available

Published
Updated

Stack: node

Affected products and versions

  • vitest

    Versions
    • >= 2.1.0-beta.7, < 4.1.12: Affected
    • >= 5.0.0, < 5.0.3: Affected

    No fix published

  • mocker

    Versions
    • >= 2.1.0-beta.7, < 4.1.12: Affected
    • >= 5.0.0, < 5.0.3: Affected

    No fix published

  • @vitest/mocker npm

    Affected ranges
    • SEMVER: ≥ 2.1.0-beta.7, < 4.1.12

    Update to 4.1.12

  • @vitest/mocker npm

    Affected ranges
    • SEMVER: ≥ 5.0.0-beta.1, < 5.0.3

    Update to 5.0.3

Original sources

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