CVE-2026-35599 Details
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.
A denial-of-service vulnerability has been identified in Vikunja, a self-hosted task management platform, prior to version 2.3.0. The issue arises in the 'addRepeatIntervalToTime' function, which uses an O(n) loop to advance a date based on the task's 'RepeatAfter' duration. This loop continues until the date exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker can trigger billions of loop iterations. This excessive processing consumes CPU resources and holds a database connection for several minutes per request, causing a significant slowdown of the application.
Users can update to Vikunja version 2.3.0, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 10, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-407 | Inefficient Algorithmic Complexity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| vikunja vikunja | < 2.3.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 17, 2026 | Initial Analysis | [email protected] |
| Apr 10, 2026 | New CVE Received | [email protected] |