{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.4.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f484791105bd81bd5404e01410431ee6fe5769c2"
            },
            {
              "fixed": "2dbe8860179e83ed2044d5fc8ed17679ae05e5ad"
            }
          ],
          "repo": "https://github.com/seerr-team/seerr",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mc6w-69r3-62h8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22",
      "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73291.json"
  },
  "details": "Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Prior to version 3.4.0, Seerr's ImageProxy in server/lib/imageproxy.ts uses the upstream ETag and Content-Type response headers to build a cache filename for the unauthenticated GET /avatarproxy/:jellyfinUserId route, allowing a malicious or compromised Jellyfin or Emby server, or a man-in-the-middle attacker on a plaintext media-server connection, to supply traversal sequences that path.join and fs.writeFile normalize outside the cache directory, overwrite /app/dist/index.js or other files, and execute code as the node user after a container restart. This issue is fixed in version 3.4.0.",
  "id": "CVE-2026-73291",
  "modified": "2026-08-15T11:31:24.255377209Z",
  "published": "2026-08-12T14:48:21.783Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/seerr-team/seerr/releases/tag/v3.4.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73291.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/seerr-team/seerr/security/advisories/GHSA-mc6w-69r3-62h8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73291"
    },
    {
      "type": "FIX",
      "url": "https://github.com/seerr-team/seerr/commit/f484791105bd81bd5404e01410431ee6fe5769c2"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Seerr: Path traversal to RCE via /avatarproxy image cache filename from upstream ETag"
}