CVE-2026-47202: CWE-287: Improper Authentication in Kareadita Kavita
CVE-2026-47202 is a critical improper authentication vulnerability in Kavita versions prior to 0.9.0.2. It allows a remote unauthenticated attacker to request a JSON Web Token (JWT) for any user, including administrators, if the attacker knows the username. This flaw stems from improper token validation. The vulnerability has a high CVSS 4.0 score of 9.3, indicating severe impact. A fix is available in version 0.
AI Analysis
Technical Summary
Kavita, a cross-platform reading server, suffers from an improper authentication vulnerability (CWE-287) prior to version 0.9.0.2. The issue allows remote unauthenticated actors to obtain JWTs for arbitrary users, including admin accounts, by exploiting flawed token validation logic when the username is known. This can lead to unauthorized access with high privileges. The vulnerability is tracked as CVE-2026-47202 with a CVSS 4.0 score of 9.3. The vendor has addressed this issue in version 0.9.0.2.
Potential Impact
An attacker can remotely and without authentication obtain valid JWTs for any user, including administrators, if they know the username. This compromises authentication controls and can lead to full account takeover and unauthorized access to sensitive data or administrative functions. The vulnerability is critical due to the ease of exploitation and the high privileges potentially gained.
Mitigation Recommendations
Upgrade Kavita to version 0.9.0.2 or later, where this improper token validation vulnerability is fixed. Since the vendor advisory indicates the issue is resolved in this version, applying this official fix is the recommended remediation. No other mitigation steps are specified or required.
CVE-2026-47202: CWE-287: Improper Authentication in Kareadita Kavita
Description
CVE-2026-47202 is a critical improper authentication vulnerability in Kavita versions prior to 0.9.0.2. It allows a remote unauthenticated attacker to request a JSON Web Token (JWT) for any user, including administrators, if the attacker knows the username. This flaw stems from improper token validation. The vulnerability has a high CVSS 4.0 score of 9.3, indicating severe impact. A fix is available in version 0.
CVSS v4.0
Score 9.3critical
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Kavita, a cross-platform reading server, suffers from an improper authentication vulnerability (CWE-287) prior to version 0.9.0.2. The issue allows remote unauthenticated actors to obtain JWTs for arbitrary users, including admin accounts, by exploiting flawed token validation logic when the username is known. This can lead to unauthorized access with high privileges. The vulnerability is tracked as CVE-2026-47202 with a CVSS 4.0 score of 9.3. The vendor has addressed this issue in version 0.9.0.2.
Potential Impact
An attacker can remotely and without authentication obtain valid JWTs for any user, including administrators, if they know the username. This compromises authentication controls and can lead to full account takeover and unauthorized access to sensitive data or administrative functions. The vulnerability is critical due to the ease of exploitation and the high privileges potentially gained.
Mitigation Recommendations
Upgrade Kavita to version 0.9.0.2 or later, where this improper token validation vulnerability is fixed. Since the vendor advisory indicates the issue is resolved in this version, applying this official fix is the recommended remediation. No other mitigation steps are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-18T22:07:37.436Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a15e03a891d628fdc67d936
Added to database: 05/26/2026, 18:02:34 UTC
Last enriched: 06/02/2026, 21:11:15 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 148
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