Improper Authorization Vulnerability in Vikunja Project Management Software
CVE-2026-111918

5.3MEDIUM

Key Information:

Vendor

Go-vikunja

Status
Vikunja
Vendor
CVE Published:
17 October 2026

What is CVE-2026-111918?

An improper authorization issue exists in Vikunja version 1.0.0-rc0 and earlier than 2.7.0 within the RecalculateTaskPositions function. This flaw allows authenticated users with no accessible projects to modify task position entries across all tasks, potentially leading to denial of service. By manipulating their default project ID, attackers can eliminate their inbox entries and establish saved filters that create cross-tenant references, thereby amplifying the risk of unauthorized modifications.

Affected Version(s)

vikunja 1.0.0-rc0 < 2.7.0

vikunja 2.7.0

References

https://github.com/go-vikunja/vikunja/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/vikunja-1.0.0-rc0-be...
third-party-advisory

CVSS V4

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Tan-JunWei
.