What is CVE-2026-35034?

CVE-2026-35034 is a medium-severity vulnerability in Jellyfin, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-04-14.

How severe is CVE-2026-35034?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Jellyfin

CVE-2026-35034

Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a denial of service vulnerability in the SyncPlay group creation endpoint (POST /SyncPlay/New), where an authenticated user can create groups with names…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.001 (18.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Jellyfin — versions < 10.11.7

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

https://github.com/jellyfin/jellyfin/security/advisories/GHSA-v2jv-54xj-h76w (x_refsource_CONFIRM)
https://github.com/jellyfin/jellyfin/releases/tag/v10.11.7 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-35034?: CVE-2026-35034 is a medium-severity vulnerability in Jellyfin, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-04-14.
How severe is CVE-2026-35034?: Medium severity. CVSS v3 base score is 6.5 out of 10.