Privilege escalation in Go-Vikunja Vikunja
CVE-2026-111920
Vikunja 2.6.0 contains a broken access control flaw in getProjectAccessForUser (pkg/models/project_access.go), which resolves a user's effective project permission as the maximum over the project tree, silently overriding explicit lower-permission shares on sub-projects. A collaborator with write access on a parent project but read-only access to a child project can modify the child project's tasks and content.
Vulnerability class: Privilege Escalation
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Go-Vikunja Vikunja — versions 2.6.0
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-pjr3-86v4-5p7w (vendor-advisory)
- www.vulncheck.com/advisories/vikunja-2.6.0-broken-access-control-via-inherited-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111920?
- CVE-2026-111920 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Improper Privilege Management. CVSS score: 4.3/10. Published 2026-10-17.
- How severe is CVE-2026-111920?
- Medium severity. CVSS v3 base score is 4.3 out of 10.