{"id":"CVE-2026-48793","summary":"Jellyfin: Potential FFmpeg argument injection via unescaped subtitle file path","details":"Jellyfin is an open source self hosted media server. Prior to 10.11.10, a potential FFmpeg argument injection vulnerability exists in the subtitle conversion code path. SubtitleEncoder.ConvertTextSubtitleToSrtInternal (SubtitleEncoder.cs, line 382) interpolates the subtitle file path into FFmpeg command-line arguments without calling EncodingUtils.NormalizePath(). On Linux, filenames can contain double-quote characters, which break the argument quoting and allow injection of arbitrary FFmpeg arguments. The vulnerability is reachable without authentication via SubtitleController.GetSubtitle, which has no [Authorize] attribute. An attacker who can place a file in a Jellyfin media library directory (shared NAS, Samba share, guest upload) can achieve arbitrary file write on the server and information disclosure. This vulnerability is fixed in 10.11.10.","aliases":["GHSA-wwwm-px48-fpvq"],"modified":"2026-06-27T11:55:51.753993870Z","published":"2026-06-24T18:22:18.293Z","database_specific":{"cwe_ids":["CWE-88"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48793.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48793.json"},{"type":"ADVISORY","url":"https://github.com/jellyfin/jellyfin/security/advisories/GHSA-wwwm-px48-fpvq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48793"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jellyfin/jellyfin","events":[{"introduced":"0"},{"fixed":"4b4b4cd94d8d3fe20b2b2b576edbc5cfa933fe07"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"10.11.10"}]}}],"versions":["v10.11.9","v10.11.8","v10.11.7","v10.11.6","v10.11.5","v10.11.4","v10.11.3","v10.11.2","v10.11.1","v10.11.0","v10.11.0-rc9","v10.11.0-rc8","v10.11.0-rc7","v10.11.0-rc6","v10.11.0-rc5","v10.11.0-rc4","v10.11.0-rc3","v10.11.0-rc2","v10.11.0-rc1","v10.8.0-alpha5","v10.8.0-alpha4","v10.8.0-alpha3","v10.8.0-alpha2","v10.8.0-alpha1","v10.6.0","v10.5.0","v10.4.0","v10.0.1","v10.0.0","v10.0.2","v3.5.2-5"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-48793.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}