CVE-2026-34727: Vikunja

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the OIDC callback handler issues a full JWT token without checking whether the matched user has TOTP two-factor authentication enabled. When a local user with TOTP enrolled is matched via the OIDC email fallback mechanism, the second factor is completely skipped. This vulnerability is fixed in 2.3.0.

Affected products

• Vikunja Vikunja: before 2.3.0 (fixed in 2.3.0)

Published 2026-04-10. Last modified 2026-06-17.