What is CVE-2026-33473?

CVE-2026-33473 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Improper Authentication. CVSS score: 5.7/10. Published 2026-03-24.

How severe is CVE-2026-33473?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Auth bypass in Go-Vikunja Vikunja

CVE-2026-33473

Vikunja is an open-source self-hosted task management platform. Starting in version 0.13 and prior to version 2.2.1, any user that has enabled 2FA can have their TOTP reused during the standard 30 second validity window. Version 2.2.1 patches the issue.

Vulnerability class: Broken Authentication

Published 2026-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Go-Vikunja Vikunja — versions >= 0.13, < 2.2.1
Vikunja

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/go-vikunja/vikunja/security/advisories/GHSA-p747-qc5p-773r (Exploit, Vendor Advisory)
vikunja.io/changelog/vikunja-v2.2.0-was-released (Release Notes)
vikunja.io/changelog/vikunja-v2.2.2-was-released (Release Notes)

Frequently asked questions

What is CVE-2026-33473?: CVE-2026-33473 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Improper Authentication. CVSS score: 5.7/10. Published 2026-03-24.
How severe is CVE-2026-33473?: Medium severity. CVSS v3 base score is 5.7 out of 10.