CVE-2026-56857 affecting package golang 1.27.1-1

{
  "id": "d761f4fa0f036ab8879c2b949cd705283db9cd21c0d63d2b3647c90634baa5c3",
  "url": "https://osv.dev/vulnerability/AZL-107489",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-56857 affecting package golang 1.27.1-1",
    "summary": "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).",
    "evidence": "osv:AZL-107489",
    "products": [
      {
        "name": {
          "value": "golang",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-107489",
      "aliases": [
        "AZL-107489"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "1.27.0"
                },
                {
                  "last_affected": "1.27.1-1"
                }
              ]
            }
          ],
          "package": {
            "name": "golang",
            "purl": "pkg:rpm/azure-linux/golang",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-107489.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-56857"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-56857"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-56857",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321489,
  "published_at": "2026-10-08T23:17:01+00:00"
}