{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-112950", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-19T21:30:47.246Z", "datePublished": "2026-10-20T15:21:32.396Z", "dateUpdated": "2026-10-20T15:21:32.396Z"}, "containers": {"cna": {"title": "Vitest: Windows backslash traversal bypasses the @vitest/mocker redirect allowlist fix", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp"}, {"name": "https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35", "tags": ["x_refsource_MISC"], "url": "https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35"}, {"name": "https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473", "tags": ["x_refsource_MISC"], "url": "https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473"}, {"name": "https://github.com/vitest-dev/vitest/releases/tag/v4.1.12", "tags": ["x_refsource_MISC"], "url": "https://github.com/vitest-dev/vitest/releases/tag/v4.1.12"}, {"name": "https://github.com/vitest-dev/vitest/releases/tag/v5.0.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/vitest-dev/vitest/releases/tag/v5.0.3"}], "affected": [{"vendor": "vitest-dev", "product": "vitest", "versions": [{"version": ">= 4.1.11, < 4.1.12", "status": "affected"}, {"version": ">= 5.0.0-rc.2, < 5.0.3", "status": "affected"}]}, {"vendor": "@vitest", "product": "mocker", "versions": [{"version": ">= 4.1.11, < 4.1.12", "status": "affected"}, {"version": ">= 5.0.0-rc.2, < 5.0.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-20T15:21:32.396Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-xp26-3454-mjgp", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "vitest", "vendor": "vitest-dev", "versions": [{"status": "affected", "version": ">= 4.1.11, < 4.1.12"}, {"status": "affected", "version": ">= 5.0.0-rc.2, < 5.0.3"}]}, {"product": "mocker", "vendor": "@vitest", "versions": [{"status": "affected", "version": ">= 4.1.11, < 4.1.12"}, {"status": "affected", "version": ">= 5.0.0-rc.2, < 5.0.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-112950", "lastModified": "2026-10-20T16:17:05.807", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-20T16:17:05.807", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35"}, {"source": "security-advisories@github.com", "url": "https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473"}, {"source": "security-advisories@github.com", "url": "https://github.com/vitest-dev/vitest/releases/tag/v4.1.12"}, {"source": "security-advisories@github.com", "url": "https://github.com/vitest-dev/vitest/releases/tag/v5.0.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}