CVE-2026-35599: Vikunja

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request. 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.