CVE-2026-35034

Name
CVE-2026-35034
Description
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/jellyfin/jellyfin/releases/tag/v10.11.7
security-advisories@github.com https://github.com/jellyfin/jellyfin/security/advisories/GHSA-v2jv-54xj-h76w

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:jellyfin:jellyfin:*:*:*:*:*:*:*:* jellyfin >= None < 10.11.7

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
jellyfin edge-community 10.11.6-r4 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.6-r3 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.6-r1 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.6-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.5-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.4-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.3-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.1-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.11.0-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.10.7-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.10.6-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.10.5-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.10.4-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin edge-community 10.10.3-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin 3.23-community 10.11.6-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin 3.23-community 10.11.5-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable
jellyfin 3.23-community 10.11.4-r0 Simon Zeni <simon@bl4ckb0ne.ca> possibly vulnerable