CVE-2026-44776 Kavita: IDOR in /api/Download/*
Low-privileged users can access unauthorized content metadata and files by guessing IDs due to missing library-level authorization checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44776?
CVE-2026-44776 is a medium-severity missing authorization vulnerability in Kareadita Kavita, published on 26 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Kavita is a cross platform reading server. Prior to 0.9.0, the download, size-check, and chapter metadata endpoints do not enforce library-level authorization. A low-privileged user who knows or guesses a chapterId, volumeId, or seriesId belonging to a library they are not assigned to can download the full file contents, query file sizes, and read metadata for that content. This affects /api/Download/volume-size, /api/Download/chapter-size, /api/Download/series-size, /api/Download/volume, /api/Download/chapter, /api/Download/series, and /api/Chapter. This vulnerability is fixed in 0.9.0.
Weakness: CWE-639
Which versions are affected by CVE-2026-44776?
How do I fix CVE-2026-44776?
No fix has been published for CVE-2026-44776 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-2026-44776 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44776 exists.
Sources
Also known as GHSA-x3jq-95xw-gwvr.