Medium severity · published Mar 24, 2026
CVE-2026-33315
Vikunja has a 2FA Bypass via Caldav Basic Auth
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vikunja · go-vikunja
< 2.2.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33315
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33315
Patch
https://github.com/go-vikunja/vikunja/commit/cdf5d30a425d032f749b78b98b828f25ad882615
Exploit
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-47cr-f226-r4pq
Release Notes
https://vikunja.io/changelog/vikunja-v2.2.0-was-released
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