CVE-2026-35033

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 71% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
24.1%
KEV
Not listed

Published

April 14, 2026

Last Modified

April 23, 2026

Advisory Details (2)

Auto-updated May 2, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Potential SSRF + Arbitrary file read via stream argument injection · Advisory · jellyfin/jellyfin · GitHub

Affected: 10.11.7 (and backported to master) via improved sanitization of the affected API

https://github.com/jellyfin/jellyfin/security/advisories/GHSA-jh22-fw8w-2v9x
generic

Release 10.11.7 · jellyfin/jellyfin · GitHub

https://github.com/jellyfin/jellyfin/releases/tag/v10.11.7

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 37× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-21 15:24 UTCEPSS rescore
  2. 2026-07-20 18:32 UTCOSV refresh
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 02:29 UTCEPSS rescore
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  15. 2026-07-09 19:10 UTCEPSS rescore
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  20. 2026-07-06 02:23 UTCEPSS rescore
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  1. 2026-06-28 14:07 UTCEPSS rescore
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  3. 2026-06-28 04:56 UTCEPSS rescore
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  6. 2026-06-25 13:49 UTCEPSS rescore
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  11. 2026-06-22 14:25 UTCEPSS rescore
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  20. 2026-06-17 17:53 UTCEPSS rescore
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  22. 2026-06-15 17:49 UTCEPSS rescore
  23. 2026-06-14 23:18 UTCEPSS rescore
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-12 23:12 UTCEPSS rescore
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  27. 2026-06-11 14:00 UTCEPSS rescore
  28. 2026-06-10 22:18 UTCEPSS rescore
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  30. 2026-06-08 14:17 UTCEPSS rescore
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  41. 2026-06-04 13:12 UTCEPSS rescore
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  43. 2026-06-02 20:13 UTCEPSS rescore
  44. 2026-06-01 13:52 UTCEPSS rescore
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  47. 2026-05-31 22:30 UTCEPSS rescore
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  49. 2026-05-31 00:16 UTCEPSS rescore
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  52. 2026-05-29 13:44 UTCEPSS rescore
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  63. 2026-05-20 22:38 UTCEPSS rescore
  64. 2026-05-20 22:38 UTCEPSS rescore
  65. 2026-05-20 17:13 UTCEG score recompute
  66. 2026-05-20 11:22 UTCEPSS rescore
  67. 2026-05-20 11:22 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-35033?
CVE-2026-35033 is a critical vulnerability published on April 14, 2026. 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…
When was CVE-2026-35033 disclosed?
CVE-2026-35033 was first published in the National Vulnerability Database on April 14, 2026, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35033 actively exploited?
CVE-2026-35033 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35033?
CVE-2026-35033 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-35033?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35033, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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