Vitest: Windows backslash traversal bypasses the @vitest/mocker redirect allowlist fix
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.
CVE-2026-112950
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-112950
vitest
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
mocker
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "vitest-dev",
"product": "vitest",
"versions": [
{
"status": "affected",
"version": ">= 4.1.11, < 4.1.12"
},
{
"status": "affected",
"version": ">= 5.0.0-rc.2, < 5.0.3"
}
]
},
{
"vendor": "@vitest",
"product": "mocker",
"versions": [
{
"status": "affected",
"version": ">= 4.1.11, < 4.1.12"
},
{
"status": "affected",
"version": ">= 5.0.0-rc.2, < 5.0.3"
}
]
}
]- Related CVEs
- CVE-2026-112950
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #42258 · Revision 1
- Added to Heist Feed
- Publisher date