CVE-2026-42884 Audiobookshelf: Collection endpoints bypass library access controls exposing restricted library data
Authenticated users can bypass library access controls to read restricted collection metadata from unauthorized libraries.
- 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-2026-42884?
CVE-2026-42884 is a medium-severity missing authorization vulnerability in advplyr audiobookshelf, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.32.2, the GET /api/collections and GET /api/collections/:id endpoints return collections from all libraries without checking whether the requesting user has access to each collection's library. An authenticated user with access to any library can enumerate and read collections (including full book metadata) from libraries they are explicitly restricted from accessing. This vulnerability is fixed in 2.32.2.
Weakness: CWE-863
Which versions are affected by CVE-2026-42884?
How do I fix CVE-2026-42884?
No fix has been published for CVE-2026-42884 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-2026-42884 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42884 exists.
Sources
Also known as GHSA-rxw2-h55w-ffmh.