CVE-2026-49220 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

References

Link	Providers
https://github.com/jellyfin/jellyfin/security/advisories/GHSA-fv79-gmhx-xh2v

History

Wed, 24 Jun 2026 20:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 24 Jun 2026 18:45:00 +0000

Type	Values Removed	Values Added
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.
Title		Jellyfin: Potential XSS in user management
Weaknesses		CWE-79
References		https://github.com/jellyfin/jellyfin/security/advisories/GHSA-fv79-gmhx-xh2v
Metrics		cvssV3_1 `{'score': 5.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-24T18:23:04.925Z

Updated: 2026-06-24T19:19:55.345Z

Reserved: 2026-05-28T03:42:34.341Z

Link: CVE-2026-49220

Vulnrichment

Updated: 2026-06-24T19:19:28.563Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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