Description
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
References4
- github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73r… ExploitVendor Advisory
- github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810… Patch
- github.com/go-vikunja/vikunja/pull/2577 Issue Tracking
- github.com/go-vikunja/vikunja/releases/tag/v2.3.0 Release Notes
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 30 · as of 12 November 2026
- CWE
- CWE-407
Could this be exploited in your environment?
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