CVE-2026-112950

{
  "id": "CVE-2026-112950",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-20T16:17:05.807",
  "lastModified": "2026-10-28T14:16:56.487",
  "vulnStatus": "Awaiting Analysis",
  "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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-28T14:04:50.974371Z",
          "id": "CVE-2026-112950",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/vitest-dev/vitest/releases/tag/v4.1.12",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/vitest-dev/vitest/releases/tag/v5.0.3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/vitest-dev/vitest/security/advisories/GHSA-xp26-3454-mjgp",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}