CVE-2026-112950
mediumVitest is a Vite-native testing framework for JavaScript and TypeScript projects.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35 security-advisories@github.com
- https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473 security-advisories@github.com
- https://github.com/vitest-dev/vitest/releases/tag/v4.1.12 security-advisories@github.com
- https://github.com/vitest-dev/vitest/releases/tag/v5.0.3 security-advisories@github.com
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp security-advisories@github.com
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp 134c704f-9b21-4f2e-91b3-4a467353bcc0