SB2026052058 - Improper Authentication in Kavita
Published: May 20, 2026
Security Bulletin ID
SB2026052058
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2026-47202)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to take over arbitrary user accounts, including administrator accounts.
The vulnerability exists due to improper authentication in JWT token validation when processing token requests for a specified username. A remote attacker can request a JWT for any user with knowledge of the username to take over arbitrary user accounts, including administrator accounts.
Remediation
Install update from vendor's website.