CVE-2026-126499 Jellyfin before 12.0 Path Traversal via Library VirtualFolders Endpoints
Unauthenticated attackers can delete or move directories on Jellyfin servers via crafted library names, including recursively wiping data and the database.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-126499?
CVE-2026-126499 is a high-severity path traversal vulnerability in jellyfin, published on 11 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-126499?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-126499?
No fix has been published for CVE-2026-126499 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-126499 being exploited?
There is no known exploitation of CVE-2026-126499 in the wild and no public exploit code.
Sources
Also known as GHSA-6828-c7cx-hvqm, GHSA-v76m-gqgv-m4g2.