CVE-2026-44776 | THREATINT

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.

PUBLISHED Reserved 2026-05-07 | Published 2026-05-26 | Updated 2026-05-26 | Assigner GitHub_M

MEDIUM: 5.9CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-639: Authorization Bypass Through User-Controlled Key

Product status

< 0.9.0

affected

References

github.com/...Kavita/security/advisories/GHSA-x3jq-95xw-gwvr exploit

github.com/...Kavita/security/advisories/GHSA-x3jq-95xw-gwvr

cve.org (CVE-2026-44776)

nvd.nist.gov (CVE-2026-44776)

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