Apache Kyuubi: Unauthorized directory access due to missing path normalization

{
  "id": "fcd0265daf11f9e270f91fc693524904b7f68a1ebb54170ff3552b0dc3d41302",
  "url": "https://osv.dev/vulnerability/CVE-2025-66518",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Kyuubi: Unauthorized directory access due to missing path normalization",
    "summary": "Any client who can access to Apache Kyuubi Server via Kyuubi frontend protocols can bypass server-side config kyuubi.session.local.dir.allow.list and use local files which are not listed in the config. This issue affects Apache Kyuubi: from 1.6.0 through 1.10.2. Users are recommended to upgrade to version 1.10.3 or upper, which fixes the issue.",
    "evidence": "osv:CVE-2025-66518",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-66518",
      "aliases": [
        "CVE-2025-66518",
        "GHSA-f8r6-6222-9pvc"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/kyuubi",
              "type": "GIT",
              "events": [
                {
                  "introduced": "83118a514612a85b2df35a9aa3d42d75fd27aa36"
                },
                {
                  "fixed": "3b8105221a482f6f5665207d752640b41961ceac"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:kyuubi:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.6.0"
                      },
                      {
                        "fixed": "1.10.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66518.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.570889612Z",
      "provider": "osv",
      "references": [
        "https://repo.maven.apache.org/maven2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66518.json",
        "https://lists.apache.org/thread/xp460bwbyzdhho34ljd4nchyt2fmhodl",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-66518"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-27"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.6.0"
                  },
                  {
                    "last_affected": "1.10.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66518.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-66518",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496442,
  "published_at": "2026-01-05T08:46:27.649+00:00"
}