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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cg	Exploit Vendor Advisory
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cg	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*

History

20 Apr 2026, 19:55

Type	Values Removed	Values Added
CPE		cpe:2.3:a:vikunja:vikunja::::::::
First Time		Vikunja Vikunja vikunja
References	~~() https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cg -~~	() https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cg - Exploit, Vendor Advisory

13 Apr 2026, 16:16

Type	Values Removed	Values Added
References	~~() https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cg -~~	() https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8jvc-mcx6-r4cg -

10 Apr 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-10 16:16

Updated : 2026-04-20 19:55

NVD link : CVE-2026-34727

Mitre link : CVE-2026-34727

CVE.ORG link : CVE-2026-34727

JSON object : View

Products Affected

vikunja

vikunja

CWE

CWE-287

Improper Authentication

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