EUVD-2026-22770
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
2DescriptionNVD
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 of unlimited size due to insufficient input validation. By sending large payloads combined with arbitrary group IDs, an attacker can lock out the endpoint for other clients attempting to join SyncPlay groups and significantly increase the memory usage of the Jellyfin process, potentially leading to an out-of-memory crash. This issue has been fixed in version 10.11.7.
AnalysisAI
Denial of service in Jellyfin versions prior to 10.11.7 allows authenticated users to exhaust server resources and crash the SyncPlay media synchronization service via the group creation endpoint (POST /SyncPlay/New) by submitting unbounded payload sizes. An attacker can lock out legitimate clients from accessing SyncPlay functionality and trigger out-of-memory conditions through insufficient input validation on group names and IDs. …
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External POC / Exploit Code
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