CVE-2026-44776: Kavita: IDOR in /api/Download/*
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Kavitato a version that resolves this vulnerability.Fixed in 0.9.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-44776?
The severity of CVE-2026-44776 is rated as medium with a score of 5.9 according to the CVSS.
How do I fix CVE-2026-44776?
To fix CVE-2026-44776, upgrade to Kavita version 0.9.0 or later where the library-level authorization has been enforced.
What is the impact of CVE-2026-44776?
CVE-2026-44776 allows low-privileged users to access and download files from libraries they are not authorized to, potentially exposing sensitive content.
Which software is affected by CVE-2026-44776?
CVE-2026-44776 affects Kavita, a cross-platform reading server prior to version 0.9.0.
When was CVE-2026-44776 published?
CVE-2026-44776 was published on May 26, 2026.