CVE-2026-77385 Kyoo: Transcoder serves uncataloged files from the media directory
A registered user can retrieve uncataloged files from the media directory by bypassing catalog-level authorization checks in the transcoder.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77385?
CVE-2026-77385 is a medium-severity missing authorization vulnerability in zoriya Kyoo, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Kyoo is a self-hosted media server focused on movies, series, and anime. Prior to 5.1.0, a registered user with the core.play permission could supply a base64-encoded filesystem path to the transcoder. The path handling in transcoder/src/api/path.go cleaned the value and checked only that it began with Settings.SafePath before getHash processed it, while transcoder/src/api/streams.go served the accepted path without verifying a Kyoo catalog record. This missing catalog-level authorization allowed the user to retrieve hidden, temporary, operational, or other uncataloged files beneath the media directory when the path was known or guessed. This vulnerability is fixed in 5.1.0.
Which versions are affected by CVE-2026-77385?
How do I fix CVE-2026-77385?
No fix has been published for CVE-2026-77385 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-77385 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77385 exists.
Sources
Also known as GHSA-fc8v-vr3q-hc46.