CVE-2026-34727: CWE-287: Improper Authentication in go-vikunja vikunja
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.
AI Analysis
Technical Summary
CVE-2026-34727 describes an improper authentication vulnerability (CWE-287) in the open-source task management platform Vikunja before version 2.3.0. The OIDC callback handler issues a full JWT token without verifying whether the matched user has TOTP two-factor authentication enabled. When a local user with TOTP enrolled is matched through the OIDC email fallback mechanism, the second factor authentication is completely skipped, allowing potential unauthorized access. This flaw is resolved in Vikunja 2.3.0.
Potential Impact
An attacker exploiting this vulnerability could bypass the second factor of authentication (TOTP) for local users matched via the OIDC email fallback mechanism, potentially gaining unauthorized access with elevated privileges. The confidentiality and integrity of user sessions and data could be compromised. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade Vikunja to version 2.3.0 or later, where this vulnerability is fixed. Since the vendor advisory indicates the issue is resolved in 2.3.0, applying this official fix is the recommended remediation. Patch status is not explicitly stated beyond this version fix, so verify with the vendor for any additional guidance.
CVE-2026-34727: CWE-287: Improper Authentication in go-vikunja vikunja
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34727 describes an improper authentication vulnerability (CWE-287) in the open-source task management platform Vikunja before version 2.3.0. The OIDC callback handler issues a full JWT token without verifying whether the matched user has TOTP two-factor authentication enabled. When a local user with TOTP enrolled is matched through the OIDC email fallback mechanism, the second factor authentication is completely skipped, allowing potential unauthorized access. This flaw is resolved in Vikunja 2.3.0.
Potential Impact
An attacker exploiting this vulnerability could bypass the second factor of authentication (TOTP) for local users matched via the OIDC email fallback mechanism, potentially gaining unauthorized access with elevated privileges. The confidentiality and integrity of user sessions and data could be compromised. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade Vikunja to version 2.3.0 or later, where this vulnerability is fixed. Since the vendor advisory indicates the issue is resolved in 2.3.0, applying this official fix is the recommended remediation. Patch status is not explicitly stated beyond this version fix, so verify with the vendor for any additional guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-30T18:41:20.753Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d91fde1cc7ad14dacba297
Added to database: 4/10/2026, 4:05:50 PM
Last enriched: 4/18/2026, 2:35:49 PM
Last updated: 5/25/2026, 9:28:58 PM
Views: 65
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