CVE-2026-119549 Jellyfin - Server Side Request Forgery

Jellyfin <= 12.4 contains a server-side request forgery caused by bypassing SvgSecurityValidator via gzip-compressed SVG in non-SVG image data URIs, letting authenticated users fetch internal URLs or exhaust memory, exploit requires user authentication.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.44% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Server Side Request Forgery
Impact
Server Side Request Forgery, Information Disclosure, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Published
30 October 2026
Updated
1 November 2026
Weakness
CWE-918

Vendor fix

Update to a version later than 12.4 or latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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