Medium severity · published Mar 24, 2026
CVE-2026-33473
Vikunja has TOTP Reuse During Validity Window
5.7
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vikunja · go-vikunja
>= 0.13, < 2.2.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33473
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33473
Exploit
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p747-qc5p-773r
Release Notes
https://vikunja.io/changelog/vikunja-v2.2.0-was-released
Release Notes
https://vikunja.io/changelog/vikunja-v2.2.2-was-released
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