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CVE-2026-35599

Vikunja has an Algorithmic Complexity DoS in Repeating Task Handler

Published: Apr 10, 2026Updated: Apr 17, 2026 Sources: CVE List NVDCWE-407
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 72.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-407

Affected Products

vikunja
oss-project
vikunjaOn-prem
Enterprise Software / collaboration-groupware
go-vikunja
oss-projectaka vikunja
vikunjaOn-prem
Cloud & SaaS / saas-application

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481b
github.com
https://github.com/go-vikunja/vikunja/pull/2577
github.com
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
github.com
and 1 more references View all →

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