{"id":"CVE-2026-112950","published":"2026-10-20T16:17:05.807","lastModified":"2026-10-20T19:56:45.543","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.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-22"],"vendors":[],"products":[],"references":[{"url":"https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35","tags":[]},{"url":"https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v4.1.12","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v5.0.3","tags":[]},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp","tags":[]}],"exploitRefs":[{"url":"https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35","tags":[]},{"url":"https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v4.1.12","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v5.0.3","tags":[]},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp","tags":[]}],"hasPoc":true,"ai":null}