CVE-2026-35034
Last modified
CVE-2026-35034 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.26% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jellyfin | Jellyfin | < 10.11.7 |
References
- https://github.com/jellyfin/jellyfin/releases/tag/v10.11.7Product, Release Notes
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-35034?
How severe is CVE-2026-35034?
How do I fix CVE-2026-35034?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-35029LiteLLM is a proxy server (AI Gateway) to call LLM APIs in O…8.8
- CVE-2026-3503Protection mechanism failure in wolfCrypt post-quantum imple…5.2
- CVE-2026-35030LiteLLM is a proxy server (AI Gateway) to call LLM APIs in O…9.4
- CVE-2026-35031Jellyfin is an open source self hosted media server. Version…8.8
- CVE-2026-35032Jellyfin is an open source self hosted media server. Version…8.1
- CVE-2026-35033Jellyfin is an open source self hosted media server. Version…9.1
- CVE-2026-35035CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a …9
- CVE-2026-35036Ech0 is an open-source, self-hosted publishing platform for …7.5
- CVE-2026-35037Ech0 is an open-source, self-hosted publishing platform for …7.2
- CVE-2026-35038Signal K Server is a server application that runs on a centr…6.5
- CVE-2026-35039fast-jwt provides fast JSON Web Token (JWT) implementation. …9.1
- CVE-2026-3504The Dokan: AI Powered WooCommerce Multivendor Marketplace So…5.3
Are you affected by CVE-2026-35034?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST