Vulnary
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Critical· 9.9official fix available

CVE-2026-35031

Jellyfin media server versions prior to 10.11.7 contain a critical vulnerability in the subtitle upload endpoint that allows attackers with administrative privileges to perform path traversal, leading to arbitrary file writes and eventual remote code execution. The vulnerability is resolved in version 10.11.7.

publishedApr 14, 2026
last modifiedJul 24, 2026
sourcesNVD
severity · cvss
9.9
critical · how bad it is
exploitation · epss
<1%
51th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 25, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Jellyfin media server users running versions before 10.11.7

02

Real-world impact

Attackers could exploit this to gain full system control as root, potentially compromising the entire server and data.

03

Why this severity

CVSS 9.9 (critical): High confidence in exploitation leading to severe consequences like remote code execution.

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade Jellyfin to version 10.11.7 or later immediately.

NVD-referenced vulnerability description

05

Timeline

  1. Apr 14, 2026 · Apr 14, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 24, 2026 · 11d ago
    Advisory updated
    The NVD record was last revised.
  3. Jul 26, 2026 · 10d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredLow
User interactionNone needed
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →