CVE-2026-126499

HIGH 7.4

Jellyfin before 12.0 Path Traversal via Library VirtualFolders Endpoints

CVSS Score

7.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	jellyfin
Product	jellyfin
Published	Nov 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Affected Versions

jellyfin / jellyfin

0 < 12.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/jellyfin/jellyfin/security/advisories/GHSA-6828-c7cx-hvqm github.com: https://github.com/jellyfin/jellyfin/commit/0c560b22ce73323329645b836c9910abc257ce4e github.com: https://github.com/jellyfin/jellyfin/releases/tag/v12.0 github.com: https://github.com/jellyfin/jellyfin/blob/v10.11.11/Jellyfin.Api/Controllers/LibraryStructureController.cs#L127-L176 github.com: https://github.com/jellyfin/jellyfin/blob/v10.11.11/Emby.Server.Implementations/Library/LibraryManager.cs#L3255-L3275 vulncheck.com: https://www.vulncheck.com/advisories/jellyfin-before-12.0-path-traversal-via-library-virtualfolders-endpoints