Auth bypass in Go-Vikunja Vikunja
CVE-2026-33312
Vikunja is an open-source self-hosted task management platform. Starting in version 0.20.2 and prior to version 2.2.0, the `DELETE /api/v1/projects/:project/background` endpoint checks `CanRead` permission instead of `CanUpdate`, allowing any user with read-only access to a project to permanently delete its background image. Version 2.2.0 fixes the issue.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (21.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Go-Vikunja Vikunja — versions >= 0.20.2, < 2.2.0
- Vikunja
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-564f-wx8x-878h (Exploit, Vendor Advisory)
- vikunja.io/changelog/vikunja-v2.2.0-was-released (Release Notes)
Frequently asked questions
- What is CVE-2026-33312?
- CVE-2026-33312 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-03-20.
- How severe is CVE-2026-33312?
- Medium severity. CVSS v3 base score is 5.4 out of 10.