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CVE-2026-34727

Vikunja ahs a TOTP Two-Factor Authentication Bypass via OIDC Login Path

Published: Apr 10, 2026Updated: Apr 20, 2026 Sources: CVE List NVDCWE-287
NVD MITRE
7.4CVSSHIGH
EPSS Score
0.3%
Top 80.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-287

Affected Products

vikunjavikunja
On-prem
Enterprise Software / collaboration-groupware
vikunjago-vikunja
On-prem
Cloud & SaaS / saas-application
vikunjaoss-projectEnterprise Software
go-vikunjaoss-projectCloud & SaaSaka vikunja

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cg
github.com

Timeline

Published
Apr 10, 2026
Last Updated
Apr 20, 2026

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