Vitest: Windows backslash traversal bypasses the @vitest/mocker redirect allowlist fix

[ Description ]Official description

Vitest is a Vite-native testing framework for JavaScript and TypeScript projects. From 4.1.11 until 4.1.12 and 5.0.3, isFileLoadingAllowed and the filesystem read interpret backslashes differently on Windows in packages/mocker/src/node/interceptorPlugin.ts. When a client can reach the Vite dev server on Windows and register a redirect mock containing backslash traversal, POSIX joining preserves a Windows backslash traversal that the later filesystem read interprets as a path separator, so the client can read a file outside server.fs.allow that the Vitest process can access. This issue is fixed in versions 4.1.12 and 5.0.3.

[ Fixes ]Fixes and patches

• @vitest/mocker 4.1.12Fixed version · GitHub Advisories · npm package @vitest/mocker: upgrade to 4.1.12 or later (affected >= 4.1.11, < 4.1.12)
• @vitest/mocker 5.0.3Fixed version · GitHub Advisories · npm package @vitest/mocker: upgrade to 5.0.3 or later (affected >= 5.0.0-rc.2, < 5.0.3)

[ Packages ]Affected open-source packages

• @vitest/mocker npmAffected >= 4.1.11, < 4.1.12 · fixed in 4.1.12 · GHSA-xp26-3454-mjgp
• @vitest/mocker npmAffected >= 5.0.0-rc.2, < 5.0.3 · fixed in 5.0.3 · GHSA-xp26-3454-mjgp

[ References ]References

• github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35
• github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473
• github.com/vitest-dev/vitest/releases/tag/v4.1.12
• github.com/vitest-dev/vitest/releases/tag/v5.0.3
• github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp