Is CVE-2026-35599 in the CISA KEV catalog?

No. CVE-2026-35599 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-35599?

CVE-2026-35599 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-35599?

CVE-2026-35599 has an EPSS score of 0.35% (27th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-35599?

Upgrade vikunja to 2.3.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-35599

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-407

How to fix

Remediation Available

vikunjaNVD

Affected:< 2.3.0Fixed in:2.3.0CVE-2026-35599derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.35%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Issue Tracking1

github.com

Release Notes1

github.com

Embed a live status badge for CVE-2026-35599

Markdown

[![CVE-2026-35599](https://tridentstack.com/cve/badge/CVE-2026-35599.svg)](https://tridentstack.com/cve/CVE-2026-35599)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-35599"><img src="https://tridentstack.com/cve/badge/CVE-2026-35599.svg" alt="CVE-2026-35599"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-17.