{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "jellyfin",
          "vendor": "jellyfin",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 10.9.0, \u003c 10.11.10"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T18:18:46.137Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/jellyfin/jellyfin/security/advisories/GHSA-jg92-mrxq-vv75",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/jellyfin/jellyfin/security/advisories/GHSA-jg92-mrxq-vv75"
        }
      ],
      "source": {
        "advisory": "GHSA-jg92-mrxq-vv75",
        "discovery": "UNKNOWN"
      },
      "title": "Jellyfin: Potential Authenticated path traversal in /ClientLog/Document"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-49247",
    "datePublished": "2026-06-24T18:18:46.137Z",
    "dateReserved": "2026-05-28T14:33:01.178Z",
    "dateUpdated": "2026-06-24T18:18:46.137Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-49247",
      "date": "2026-06-14",
      "epss": "0.00018",
      "percentile": "0.0518"
    }
  }
}