SSRF in Jellyfin
CVE-2026-119549
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/jellyfin/jellyfin/blob/v12.4/src/Jellyfin.Drawing.Skia/SvgSecurityVa… (technical-description)
- github.com/jellyfin/jellyfin/blob/v12.4/Jellyfin.Api/Controllers/ImageControlle… (technical-description)
- github.com/jellyfin/jellyfin/security/advisories/GHSA-cf3c-8m59-2vhx (related, vendor-advisory)
- abraxaslabs.tech/research/jellyfin-svg-gzip (third-party-advisory)
- github.com/jellyfin/jellyfin (product)
- www.vulncheck.com/advisories/jellyfin-through-12.4-ssrf-via-gzip-compressed-dat… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119549?
- CVE-2026-119549 is a high-severity vulnerability in Jellyfin, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.1/10. Published 2026-10-30.
- How severe is CVE-2026-119549?
- High severity. CVSS v3 base score is 7.1 out of 10.