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

Quick assessment

Affected
Kareadita Kavita
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

kavita是Kavita开源的一个快速、功能丰富的跨平台阅读服务器。 kavita 0.9.0之前版本存在安全漏洞，该漏洞源于下载、大小检查和章节元数据端点未执行库级授权，可能导致低权限用户访问未授权内容。

AI Predicted 6.5 Difficulty: Easy EPSS 0.25% · P17

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
Kareadita Kavita < 0.9.0 affected
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I. Basic Information for CVE-2026-44776

Vulnerability Information
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Vulnerability Title
Kavita: IDOR in /api/Download/*
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
kavita 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
kavita是Kavita开源的一个快速、功能丰富的跨平台阅读服务器。 kavita 0.9.0之前版本存在安全漏洞，该漏洞源于下载、大小检查和章节元数据端点未执行库级授权，可能导致低权限用户访问未授权内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kareadita Kavita < 0.9.0 -

II. Public POCs for CVE-2026-44776

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III. Intelligence Information for CVE-2026-44776

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Vendor Advisories for CVE-2026-44776 (1)

Same Patch Batch · Kareadita · 2026-05-26 · 3 CVEs total

CVE-2026-47202 Kavita: Pre-Auth Account Takeover
CVE-2026-44775 Kavita: No authentication at /api/Reader/image

IV. Related Vulnerabilities

Same product: Kavita
Same vendor: Kareadita
Same weakness: CWE-639

V. Comments for CVE-2026-44776

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