CVE-2026-57458
Published:October 09, 2026
Updated:October 13, 2026
Vikunja is an open-source self-hosted task management platform. In version 2.3.0, a scoped API token limited to the "oauth.authorize" permission can call "POST /api/v1/oauth/authorize", obtain an OAuth authorization code, and exchange the code at "POST /api/v1/oauth/token" for a normal bearer JSON Web Token (JWT) and refresh token. The resulting credentials are not restricted by the original API token's permissions, allowing access to routes outside its declared scope for the same user. Version 2.4.0 fixes the vulnerability.
Affected Packages
https://github.com/go-vikunja/vikunja.git (GITHUB):
Affected version(s) =v2.3.0 <v2.4.0Fix Suggestion:
Update to version v2.4.0github.com/go-vikunja/vikunja (GO):
Affected version(s) =v2.3.0 <v2.4.0Fix Suggestion:
Update to version v2.4.0Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Privilege Management
EPSS
Base Score:
0.27