Broken Access Control Vulnerability in Vikunja by Vikunja Team
CVE-2026-111920

5.3MEDIUM

Key Information:

Vendor

Go-vikunja

Status
Vikunja
Vendor
CVE Published:
17 October 2026

What is CVE-2026-111920?

The Vikunja 2.6.0 version has a significant broken access control vulnerability in the getProjectAccessForUser function. This flaw allows a user's project permissions to escalate based on the maximum permission levels found in the project hierarchy, disregarding the specified lower-permission settings of child projects. In practical terms, a user who possesses write rights to a parent project, but only read rights to a child project, could still manipulate and modify tasks and content within the child project. This behavior poses significant security risks as it permits unauthorized access and changes, undermining the integrity of project management within Vikunja.

Affected Version(s)

vikunja 2.6.0

References

https://github.com/go-vikunja/vikunja/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/vikunja-2.6.0-broken...
third-party-advisory

CVSS V4

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Viv3kGupt4
.