Jellyfin: Potential XSS in user management_CVE-2026-49220

5.7 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Description

Jellyfin is an open source self hosted media server. Prior to 10.11.9, a potential XSS attack exists in Jellyfin which can allow a non-privileged user to execute arbitrary Javascript in the context of a logged-in Administrative user, resulting in numerous potential issues. The Client header during an AuthenticateByName can contain arbitrary HTML and Javascript, which will then be executed by the Administrative user when visiting the Access tab of the user in question from within the dashboard. This vulnerability is fixed in 10.11.9.

Basic Information

ID CVE-2026-49220

Source GitHub_M

Published Jun 24, 2026 at 18:23

Modified Jun 24, 2026 at 19:19

Affected Product

Vendor jellyfin

Product jellyfin

Version < 10.11.9

Affected Versions jellyfin jellyfin < 10.11.9

CWE Classification

CWE-79

References

github.com /jellyfin/jellyfin/security/advisories/GHSA-fv79-gmhx-xh2v

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    "published": "2026-06-24T18:23:04.925Z",
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