CVE-2023-49096 — Jellyfin is a Free Software Media System for managing and streaming media

Jellyfin is a Free Software Media System for managing and streaming media. In affected versions there is an argument injection in the VideosController, specifically the `/Videos/<itemId>/stream` and `/Videos/<itemId>/stream.<container>` endpoints which are prese

01What is this vulnerability?

Jellyfin is a Free Software Media System for managing and streaming media. In affected versions there is an argument injection in the VideosController, specifically the `/Videos/<itemId>/stream` and `/Videos/<itemId>/stream.<container>` endpoints which are present in the current Jellyfin version. Additional endpoints in the AudioController might also be vulnerable, as they differ only slightly in…

02Affected products

Vendor	Product	Versions
jellyfin	jellyfin	< 10.8.13

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-06T19:14:11.108Z
• Last modified: 2025-05-28T15:44:52.025Z

09References

• github.com — https://github.com/jellyfin/jellyfin/security/advisories/GHSA-866x-wj5j-2vf4
• github.com — https://github.com/jellyfin/jellyfin/issues/5415
• github.com — https://github.com/jellyfin/jellyfin/commit/a656799dc879d16d21bf2ce7ad412ebd5d45…
• cwe.mitre.org — https://cwe.mitre.org/data/definitions/88.html
• en.wikipedia.org — https://en.wikipedia.org/wiki/Pass_the_hash
• ffmpeg.org — https://ffmpeg.org/ffmpeg-filters.html#drawtext-1