CVE-2026-33676 Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read
Authenticated users can view details of tasks in projects they lack access to via cross-project relations, exposing sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33676?
CVE-2026-33676 is a medium-severity missing authorization vulnerability in go-vikunja vikunja, published on 24 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, when the Vikunja API returns tasks, it populates the `related_tasks` field with full task objects for all related tasks without checking whether the requesting user has read permission on those tasks' projects. An authenticated user who can read a task that has cross-project relations will receive full details (title, description, due dates, priority, percent completion, project ID, etc.) of tasks in projects they have no access to. Version 2.2.1 patches the issue.
Weakness: CWE-863
Which versions are affected by CVE-2026-33676?
3 open source packages ship an affected version, including code.vikunja.io/api. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
code.vikunja.io/api Go | All versions | None |
code.vikunja.io/api Go | All versions | 2.2.1 |
code.vikunja.io/api Go | All versions | 2.2.1 |
Products include Vikunja Vikunja.
How do I fix CVE-2026-33676?
Upgrade code.vikunja.io/api to 2.2.1 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-33676 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33676 exists.
Other vulnerabilities in go-vikunja vikunja
- CVE-2026-28268 Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse
- CVE-2026-27575 Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change
- CVE-2026-25935 Vikunja Affected by XSS Via Task Preview
- CVE-2026-35595 Vikunja Affected by Privilege Escalation via Project Reparenting
- CVE-2026-33316 Vikunja’s Improper Access Control Enables Bypass of Administrator-Imposed Account Disablement
Sources
Also known as GHSA-8cmm-j6c4-rr8v, GO-2026-4847.