CVE-2026-35598: CWE-862: Missing Authorization in go-vikunja vikunja
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV GetResource and GetResourcesByList methods fetch tasks by UID from the database without verifying that the authenticated user has access to the task's project. Any authenticated CalDAV user who knows (or guesses) a task UID can read the full task data from any project on the instance. This vulnerability is fixed in 2.3.0.
AI Analysis
Technical Summary
CVE-2026-35598 describes a missing authorization vulnerability (CWE-862) in the open-source task management platform Vikunja prior to version 2.3.0. Specifically, the CalDAV interface methods GetResource and GetResourcesByList retrieve tasks by UID without verifying that the authenticated user has permission to access the associated project. This allows any authenticated CalDAV user who knows or can guess a task UID to read full task details from any project on the instance. The vulnerability affects confidentiality but not integrity or availability. The issue is resolved in Vikunja 2.3.0.
Potential Impact
An authenticated CalDAV user can read full task data from any project by exploiting the missing authorization check. This leads to unauthorized disclosure of task information across projects. There is no impact on data integrity or availability. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Vikunja to version 2.3.0 or later, where this authorization issue is fixed. Since no official patch link or advisory is provided, users should verify the upgrade from the vendor's official release notes. No other mitigations are indicated.
CVE-2026-35598: CWE-862: Missing Authorization in go-vikunja vikunja
Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV GetResource and GetResourcesByList methods fetch tasks by UID from the database without verifying that the authenticated user has access to the task's project. Any authenticated CalDAV user who knows (or guesses) a task UID can read the full task data from any project on the instance. This vulnerability is fixed in 2.3.0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-35598 describes a missing authorization vulnerability (CWE-862) in the open-source task management platform Vikunja prior to version 2.3.0. Specifically, the CalDAV interface methods GetResource and GetResourcesByList retrieve tasks by UID without verifying that the authenticated user has permission to access the associated project. This allows any authenticated CalDAV user who knows or can guess a task UID to read full task details from any project on the instance. The vulnerability affects confidentiality but not integrity or availability. The issue is resolved in Vikunja 2.3.0.
Potential Impact
An authenticated CalDAV user can read full task data from any project by exploiting the missing authorization check. This leads to unauthorized disclosure of task information across projects. There is no impact on data integrity or availability. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade Vikunja to version 2.3.0 or later, where this authorization issue is fixed. Since no official patch link or advisory is provided, users should verify the upgrade from the vendor's official release notes. No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-03T21:25:12.162Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d9d9751cc7ad14da3f872f
Added to database: 4/11/2026, 5:17:41 AM
Last enriched: 4/18/2026, 2:22:44 PM
Last updated: 5/26/2026, 12:43:20 PM
Views: 97
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