Auth bypass in Go-Vikunja Vikunja
CVE-2026-34727
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the OIDC callback handler issues a full JWT token without checking whether the matched user has TOTP two-factor authentication enabled. When a local user with TOTP enrolled is matched via the OIDC email fallback mechanism, the second factor is completely skipped. This vulnerability is fixed in 2.3.0.
Vulnerability class: Broken Authentication
EPSS: 0.003 (20.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Go-vikunja Vikunja — versions < 2.3.0
- Vikunja
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34727?
- CVE-2026-34727 is a high-severity vulnerability in Go-Vikunja Vikunja, classified under Improper Authentication. CVSS score: 7.4/10. Published 2026-04-10.
- How severe is CVE-2026-34727?
- High severity. CVSS v3 base score is 7.4 out of 10.