Uncontrolled Resource Consumption in Vikunja by Go Vikunja
CVE-2026-123511

5.3MEDIUM

Key Information:

Vendor

Go-vikunja

Status
Vikunja
Vendor
CVE Published:
8 November 2026

What is CVE-2026-123511?

Vikunja versions prior to 2.7.1 are susceptible to an uncontrolled resource consumption vulnerability wherein authenticated CalDAV clients can create an excessive number of dummy tasks. By sending VTODOs populated with numerous RELATED-TO properties, attackers can exploit this weakness to generate thousands of task, relation, and event entries in the database, leading to severe database bloat and potential overload of the event processing pipeline.

Affected Version(s)

vikunja 0 < 2.7.1

vikunja 2.7.1

References

https://github.com/go-vikunja/vikunja/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/vikunja-before-2.7.1...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.