CVE-2026-123509

MEDIUM 4.3

Vikunja before 2.7.1 Denial of Service via Unbounded Kanban Bucket Count

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

Vikunja before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows project writers or view admins to create unlimited kanban buckets due to missing count caps. Attackers can create thousands of buckets so every kanban read runs a task SELECT and COUNT per bucket, generating heavy database load.

CWE	CWE-770
Vendor	go-vikunja
Product	vikunja
Published	Nov 8, 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:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

go-vikunja / vikunja

0 < 2.7.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p697-wq4x-grpj vulncheck.com: https://www.vulncheck.com/advisories/vikunja-before-2.7.1-denial-of-service-via-unbounded-kanban-bucket-count