Medium severity · published May 26, 2026
CVE-2026-44776
Kavita: IDOR in /api/Download/*
5.9
CVSS
0.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KA
Kavita · Kareadita
< 0.9.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44776
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44776
github.com
https://github.com/Kareadita/Kavita/security/advisories/GHSA-x3jq-95xw-gwvr
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