Auth bypass in Go-Vikunja Vikunja
CVE-2026-33668
Vikunja is an open-source self-hosted task management platform. Starting in version 0.18.0 and prior to version 2.2.1, when a user account is disabled or locked, the status check is only enforced on the local login and JWT token refresh paths. Three other authentication paths — API tokens, CalDAV basic auth, and OpenID Connect — do not verify user status, allowing disabled or locked users to continue accessing the API and syncing data. Version 2.2.1 patches the issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Go-Vikunja Vikunja — versions >= 0.18.0, < 2.2.1
- Vikunja
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-94xm-jj8x-3cr4 (Exploit, Vendor Advisory)
- github.com/go-vikunja/vikunja/commit/033922309f492996c928122fb49b691339199c35 (Patch)
- github.com/go-vikunja/vikunja/commit/04704e0fde4b027039cf583110cee7afe136fc1b (Patch)
- github.com/go-vikunja/vikunja/commit/0b04768d830c80e9fde1b0962db1499cc652da0e (Patch)
- github.com/go-vikunja/vikunja/commit/fd452b9cb6457fd4f9936527a14c359818f1cca7 (Patch)
- vikunja.io/changelog/vikunja-v2.2.2-was-released (Release Notes)
Frequently asked questions
- What is CVE-2026-33668?
- CVE-2026-33668 is a high-severity vulnerability in Go-Vikunja Vikunja, classified under Improper Authorization. CVSS score: 8.1/10. Published 2026-03-24.
- How severe is CVE-2026-33668?
- High severity. CVSS v3 base score is 8.1 out of 10.