CVE-2026-49220
Last modified
CVE-2026-49220 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. 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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-49220?
How severe is CVE-2026-49220?
How do I fix CVE-2026-49220?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-49214guzzlehttp/psr7 is a PSR-7 HTTP message library implementati…5.3
- CVE-2026-49215Symfony UX is a JavaScript ecosystem for Symfony. From 2.22.…5.4
- CVE-2026-49216Symfony UX is a JavaScript ecosystem for Symfony. From 2.2.0…5.4
- CVE-2026-49218ImageMagick is free and open-source software used for editin…7.5
- CVE-2026-49219ImageMagick is free and open-source software used for editin…5.5
- CVE-2026-4922GitLab has remediated an issue in GitLab CE/EE affecting all…8.1
- CVE-2026-49229Actual is a local-first personal finance app. Prior to 26.6.…8.3
- CVE-2026-4923Impact: When using multiple wildcards, combined with at lea…5.9
- CVE-2026-49230Improper Validation of Integrity Check Value vulnerability i…9.1
- CVE-2026-49231Authentication Bypass by Spoofing vulnerability in opa plugi…5.4
- CVE-2026-49232Routinator exits on any error when accepting incoming HTTP o…8.7
- CVE-2026-49233Routinator does not properly check the module component of r…7.5
Are you affected by CVE-2026-49220?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST