What’s Vulnerable › Vulnerabilities

CVE-2026-44776: Kavita: IDOR in /api/Download/*

• Severity: medium (CVSS 5.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-26 · updated 2026-07-24
• Weakness: CWE-639

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.

Affected products

• Kareadita Kavita: before 0.9.0

References

• https://github.com/Kareadita/Kavita/security/advisories/GHSA-x3jq-95xw-gwvr
• https://github.com/Kareadita/Kavita/security/advisories/GHSA-x3jq-95xw-gwvr

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