data/osv/GO-2026-6604.json

{
  "schema_version": "1.3.1",
  "id": "GO-2026-6604",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2026-56857"
  ],
  "summary": "Root.Mkdir(All) can follow junctions out of the root on Windows in os",
  "details": "On Windows, when the target of Root.Mkdir or Root.MkdirAll is a junction pointing to an empty location, the operation can create a directory at the junction target even when that target is located outside the root. This only applies to operations where the last path component is a junction (path/to/junction, but not path/junction/target).",
  "affected": [
    {
      "package": {
        "name": "stdlib",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.26.9"
            },
            {
              "introduced": "1.27.0-0"
            },
            {
              "fixed": "1.27.2"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "os",
            "goos": [
              "windows"
            ],
            "symbols": [
              "Root.Chmod",
              "Root.Chown",
              "Root.Chtimes",
              "Root.Lchown",
              "Root.Link",
              "Root.Mkdir",
              "Root.MkdirAll",
              "Root.Remove",
              "Root.RemoveAll",
              "Root.Rename",
              "Root.Symlink",
              "doInRoot",
              "rootMkdirAll"
            ]
          },
          {
            "path": "internal/syscall/windows",
            "goos": [
              "windows"
            ],
            "symbols": [
              "Mkdirat"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://go.dev/cl/847305"
    },
    {
      "type": "REPORT",
      "url": "https://go.dev/issue/81739"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
    }
  ],
  "credits": [
    {
      "name": "Daniele Ballarini"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2026-6604",
    "review_status": "REVIEWED"
  }
}