Access Control Vulnerability in Vikunja Task Management Platform
CVE-2026-35598

4.3MEDIUM

Key Information:

Vendor

Go-vikunja

Status
Vikunja
Vendor
CVE Published:
10 April 2026

What is CVE-2026-35598?

Vikunja is an open-source task management platform that has a vulnerability allowing authenticated CalDAV users to access task data without proper authorization. Prior to version 2.3.0, the CalDAV GetResource and GetResourcesByList methods retrieved tasks using their unique identifiers (UID) without verifying the project's access permissions associated with the authenticated user. As a result, any user with knowledge of a task's UID could potentially view sensitive information across all projects within that instance. This issue was addressed in version 2.3.0, which includes the necessary checks to mitigate unauthorized access.

Affected Version(s)

vikunja < 2.3.0

References

https://github.com/go-vikunja/vikunja/security/advisories...
x_refsource_CONFIRM
https://github.com/go-vikunja/vikunja/pull/2579
x_refsource_MISC
https://github.com/go-vikunja/vikunja/commit/879462d71735...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.