CVE-2026-35033 Details
Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain an unauthenticated arbitrary file read vulnerability via ffmpeg argument injection through the StreamOptions query parameter parsing mechanism. The ParseStreamOptions method in StreamingHelpers.cs adds any lowercase query parameter to a dictionary without validation, bypassing the RegularExpression attribute on the level controller parameter, and the unsanitized value is concatenated directly into the ffmpeg command line. By injecting a drawtext filter with a textfile argument, an attacker can read arbitrary server files such as /etc/shadow and exfiltrate their contents as text rendered in the video stream response. The vulnerable /Videos/{itemId}/stream endpoint has no Authorize attribute, making this exploitable without authentication, though item GUIDs are pseudorandom and require an authenticated user to obtain. This issue has been fixed in version 10.11.7.
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Exploit prediction scoring system (EPSS) score for CVE-2026-35033
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.09 Probability of exploitation activity being observed over the next 30 days (26th percentile)
CVSS score for CVE-2026-35033
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9.1 Critical
Products affected by CVE-2026-35033
Jellyfin 10.11.1
Jellyfin 10.11.2
Jellyfin 10.11.3
Jellyfin 10.11.4
Jellyfin 10.6.4
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-35033 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 115 28.89%
DE 47 11.81%
FR 41 10.30%
CA 21 5.28%
AU 16 4.02%
NL 15 3.77%
GB 13 3.27%
RU 12 3.02%
ES 12 3.02%
SE 10 2.51%

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CVE-2026-35033 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 143 56.30%
Technology 101 39.76%
Government/Politics 3 1.18%
Education 3 1.18%
Engineering 3 1.18%
Energy/Resources 1 0.39%

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