Kavita: No authentication at /api/Reader/image
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
Kavita is a cross platform reading server. Prior to 0.9.0, the ReaderController.GetImage endpoint is decorated with [AllowAnonymous], allowing completely unauthenticated access to page images from any chapter in any library. While the endpoint accepts an apiKey parameter, it is never validated. Since entity IDs are sequential integers, an unauthenticated attacker can trivially enumerate all content on the server. This vulnerability is fixed in 0.9.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Kavita (Kareadita) Fixed in 0.9.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44775
References
More Kareadita vulnerabilities
- TI-2022-03662 Improper Restriction of Excessive Authentication Attempts in kareadita/kavita CVSS 3.1CRITICAL 9.8
- TI-2022-26712 Path traversal in Kavita lets unauthenticated attackers read files CVSS 4.0HIGH 8.7
- TI-2026-32661 Kavita: IDOR in /api/Download/* CVSS 4.0MEDIUM 5.9
- TI-2022-03617 Improper Restriction of Excessive Authentication Attempts in kareadita/kavita CVSS 3.1MEDIUM 5.3
- TI-2026-34790 Kavita: Pre-Auth Account Takeover CVSS 4.0CRITICAL 9.3
- TI-2023-00871 Missing Authentication for Critical Function in kareadita/kavita CVSS 3.1HIGH 8.1
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences