CVE-2026-27575: Vikunja

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the application allows users to set weak passwords (e.g., 1234, password) without enforcing minimum strength requirements. Additionally, active sessions remain valid after a user changes their password. An attacker who compromises an account (via brute-force or credential stuffing) can maintain persistent access even after the victim resets their password. Version 2.0.0 contains a fix.

Affected products

• Vikunja Vikunja: before 2.0.0 (fixed in 2.0.0)

Published 2026-02-25. Last modified 2026-06-17.