Auth bypass in Go-Vikunja Vikunja
CVE-2026-68582
Vikunja versions >= 0.24.0 and <= 2.3.0 contain a broken object level authorization (BOLA) vulnerability in the task-collection endpoint (GET /api/v1/projects/{project}/views/{view}/tasks). The endpoint loads the requested project view from the URL path without verifying the caller is authorized for it. For a link-share token holder, the task scope is pinned to the share's own project, but the view is taken from the attacker-controlled path and never re-validated. As a result, a holder of any project share link can read any other tenant's kanban bucket records — bucket titles and the full created_by user object (username, name, id) — for every view in the instance. The same missing pre-authorization view load also creates a project/view-ID existence oracle (404 vs. non-404) usable by link shares and ordinary authenticated users. Task contents remain constrained to the share's own project and are not disclosed. Fixed in 2.4.0.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (26.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.003 · change: -0.000
Affected products
- Go-Vikunja Vikunja — versions 0.24.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-rj9j-8772-4h6c (vendor-advisory)
- www.vulncheck.com/advisories/vikunja-broken-object-level-authorization-via-link… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-68582?
- CVE-2026-68582 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-08-02.
- How severe is CVE-2026-68582?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2026-68582 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.