Path traversal in Jellyfin - #VU151798
Published: September 23, 2026
Vulnerability identifier: #VU151798
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in the virtual-folder management endpoints. A remote attacker can send a specially crafted HTTP request and delete or relocate arbitrary files on the system.
Affected software
Jellyfin
Remediation
Install updates from vendor's website.
Jellyfin - update to 12.0