CVE-2026-33315 MEDIUM

CVE-2026-33315: Vikunja has a 2FA Bypass via Caldav Basic Auth

Vendor Go-Vikunja
Product vikunja
Weakness CWE-288
Published March 24, 2026
Last update March 24, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.

Key dates

02Disclosure timeline

March 24, 2026 CVE published
March 24, 2026 Record updated