What is CVE-2026-49220?

CVE-2026-49220 is a medium-severity vulnerability in Jellyfin, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2026-06-24.

How severe is CVE-2026-49220?

Medium severity. CVSS v3 base score is 5.7 out of 10.

XSS in Jellyfin

CVE-2026-49220

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, resul…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.

Affected products

Jellyfin — versions < 10.11.9

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-49220?: CVE-2026-49220 is a medium-severity vulnerability in Jellyfin, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2026-06-24.
How severe is CVE-2026-49220?: Medium severity. CVSS v3 base score is 5.7 out of 10.