CVE-2026-49246

Jellyfin is an open source self hosted media server. Prior to 10.11.10, a specifically crafted MKV file containing forged filename tags can be leveraged to exploit missing path sanitization during playback. Jellyfin treats the MKV file name tag on MKV attachments as trusted and passes it unsanitized into Path.Combine(attachmentFolder, fileName) inside PathManager.GetAttachmentPath. Because .NET's Path.Combine neither normalises .. nor rejects a rooted second argument, a crafted MKV can redirect Jellyfin's MKV attachment extraction to any absolute path on disk. This triggers on any playback action of the affected video on a client which will attempt to burn in the subtitles by default.g This vulnerability is fixed in 10.11.10.

CVSS

No CVSS.

References

Link	Resource
https://github.com/jellyfin/jellyfin/security/advisories/GHSA-f47c-m7gr-q92j

Configurations

No configuration.

History

24 Jun 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-24 19:17

Updated : 2026-06-25 20:17

NVD link : CVE-2026-49246

Mitre link : CVE-2026-49246

CVE.ORG link : CVE-2026-49246

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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