Jellyfin: Potential FFmpeg argument injection via unescaped subtitle file path_CVE-2026-48793

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-06-24T18:22:18.293Z",
    "modified": "2026-06-24T18:50:40.962Z",
    "type": "cve",
    "title": "Jellyfin: Potential FFmpeg argument injection via unescaped subtitle file path",
    "source": "GitHub_M",
    "references": "https://github.com/jellyfin/jellyfin/security/advisories/GHSA-wwwm-px48-fpvq",
    "id": "CVE-2026-48793",
    "bulletinFamily": "",
    "cwe": [
        "CWE-88"
    ],
    "cvelist": null,
    "sourceData": "jellyfin jellyfin < 10.11.10",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "jellyfin",
    "version": "< 10.11.10",
    "vendor": "jellyfin",
    "ai_description": "Potential FFmpeg argument injection via unescaped subtitle file path in Jellyfin media server",
    "ai_severity": "High",
    "ai_vendor": "Jellyfin Team",
    "ai_product": "Jellyfin",
    "ai_version": "< 10.11.10",
    "ai_score": 8.8
}