CVE-2026-126499 json
Jellyfin before 12.0 Path Traversal via Library VirtualFolders Endpoints
published last mo. modified yesterday also EUVD-2026-123064 , GHSA-6828-c7cx-hvqm
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository jellyfin/jellyfin. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
Jellyfin before 12.0 contains a path traversal vulnerability in the DELETE /Library/VirtualFolders and POST /Library/VirtualFolders/Name endpoints that allows attackers to delete or move directories via unvalidated library names. Unauthenticated attackers can supply names like .. or absolute paths before setup completes to recursively delete the data directory and jellyfin.db.
Patch / fix
- jellyfin jellyfin 12.0
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Check with FencerExploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.3 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H |
| CNA | 4.0 | 8.3 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H |
Affected products
- jellyfin jellyfin
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/jellyfin/jellyfin/commit/0c560b22ce73323329645b836c9910abc257ce4e
patch
-
github.com
/jellyfin/jellyfin/security/advisories/GHSA-6828-c7cx-hvqm
vendor-advisory, advisory
-
github.com
/jellyfin/jellyfin/releases/tag/v12.0
release-notes
-
github.com
/jellyfin/jellyfin/blob/v10.11.11/Jellyfin.Api/Controllers/LibraryStructureController.cs#L127-L176
technical-description
-
github.com
/jellyfin/jellyfin/blob/v10.11.11/Emby.Server.Implementations/Library/LibraryManager.cs#L3255-L3275
technical-description
-
vulncheck.com
/advisories/jellyfin-before-12.0-path-traversal-via-library-virtualfolders-endpoints
third-party-advisory
Sources
- CVE List CVE-2026-126499
- NVD CVE-2026-126499
- Maintainer advisory GHSA-6828-c7cx-hvqm
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of jellyfin/jellyfin published their own advisory on GitHub. Reviewed sources take precedence over it.