CVE-2026-35599
Vikunja has an Algorithmic Complexity DoS in Repeating Task Handler
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-407 |
| Vendor | go-vikunja |
| Product | vikunja |
| Published | Apr 10, 2026 |
| Last Updated | Apr 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
go-vikunja / vikunja
< 2.3.0
References
github.com: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7 github.com: https://github.com/go-vikunja/vikunja/pull/2577 github.com: https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481b github.com: https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0