Improper input validation in Jellyfin - CVE-2026-35032
Published: April 15, 2026
Vulnerability identifier: #VU126128
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-35032
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Jellyfin
Affected software:
Jellyfin
Jellyfin
Detailed vulnerability description
The vulnerability allows a remote user to read arbitrary files and perform server-side request forgery.
The vulnerability exists due to improper input validation in the LiveTV M3U tuner endpoint when processing user-supplied tuner URLs. A remote user can submit a specially crafted tuner URL to read arbitrary files and perform server-side request forgery.
The issue is exploitable by authenticated users because Live TV management permissions are enabled by default for new users.
How to mitigate CVE-2026-35032
Install security update from vendor's website.