CVE-2026-35599

Name: CVE-2026-35599
Creator: NVD / NIST
Published: 2026-04-10T17:17:03.52+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2026-35599 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.35%

26.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-407

Affected Software

Vendor	Product	Versions
Vikunja	Vikunja	< 2.3.0

References

https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481bPatch
https://github.com/go-vikunja/vikunja/pull/2577Issue Tracking
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0Release Notes
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7Exploit, Vendor Advisory

Timeline

Published: Apr 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-35599?

How severe is CVE-2026-35599?

CVE-2026-35599 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2026-35599?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-35599?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST