Vulnerability Description
Jellyfin through 12.4 contains a server-side request forgery vulnerability that lets authenticated users bypass SvgSecurityValidator by embedding gzip-compressed SVG in non-SVG image data URIs. Attackers can upload such profile images via POST /UserImage, then trigger unauthenticated rendering via GET /UserImage to fetch internal URLs, read local image files, or exhaust memory.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://abraxaslabs.tech/research/jellyfin-svg-gzip
- https://github.com/jellyfin/jellyfin
- https://github.com/jellyfin/jellyfin/blob/v12.4/Jellyfin.Api/Controllers/ImageCo
- https://github.com/jellyfin/jellyfin/blob/v12.4/src/Jellyfin.Drawing.Skia/SvgSec
- https://github.com/jellyfin/jellyfin/security/advisories/GHSA-cf3c-8m59-2vhx
- https://www.vulncheck.com/advisories/jellyfin-through-12.4-ssrf-via-gzip-compres
FAQ
What is CVE-2026-119549?
CVE-2026-119549 is a vulnerability with a CVSS score of 7.1 (HIGH). Jellyfin through 12.4 contains a server-side request forgery vulnerability that lets authenticated users bypass SvgSecurityValidator by embedding gzip-compressed SVG in non-SVG image data URIs. Attack...
How severe is CVE-2026-119549?
CVE-2026-119549 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-119549?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.