{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "10.9.0"
              },
              {
                "fixed": "10.11.10"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "327f92bb2e26cf058a14e7eff34ed2798dc8fc0d"
            },
            {
              "fixed": "4b4b4cd94d8d3fe20b2b2b576edbc5cfa933fe07"
            }
          ],
          "repo": "https://github.com/jellyfin/jellyfin",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-jg92-mrxq-vv75"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49247.json"
  },
  "details": "Jellyfin is an open source self hosted media server. From 10.9.0 until 10.11.10, the POST /ClientLog/Document endpoint accepts the Authorization header's Client and Version fields and uses them unsanitized as components of the on-disk filename when persisting client-uploaded log documents. As a result, any authenticated non-admin user can include ../ sequences in the Client field to cause Jellyfin to write attacker-controlled content to arbitrary paths reachable by the Jellyfin service user, with a forced .log suffix. This vulnerability is fixed in 10.11.10.",
  "id": "CVE-2026-49247",
  "modified": "2026-07-08T05:36:14.788699523Z",
  "published": "2026-06-24T18:18:46.137Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49247.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/jellyfin/jellyfin/security/advisories/GHSA-jg92-mrxq-vv75"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49247"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Jellyfin: Potential Authenticated path traversal in /ClientLog/Document"
}