CVE-2026-33676
Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read
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.
INFO
Published Date :
March 24, 2026, 4:16 p.m.
Last Modified :
March 27, 2026, 4:12 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Vikunja to version 2.2.1 or later.
- Verify access controls for related task data.
- Apply necessary authorization patches if updating is delayed.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33676.
| URL | Resource |
|---|---|
| https://github.com/go-vikunja/vikunja/commit/833f2aec006ac0f6643c41872e45dd79220b9174 | Patch |
| https://github.com/go-vikunja/vikunja/pull/2449 | Issue Tracking |
| https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8cmm-j6c4-rr8v | Exploit Vendor Advisory |
| https://vikunja.io/changelog/vikunja-v2.2.2-was-released | Release Notes |
| https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8cmm-j6c4-rr8v | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33676 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33676
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33676 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33676 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* versions up to (excluding) 2.2.1 Added Reference Type GitHub, Inc.: https://github.com/go-vikunja/vikunja/commit/833f2aec006ac0f6643c41872e45dd79220b9174 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/go-vikunja/vikunja/pull/2449 Types: Issue Tracking Added Reference Type GitHub, Inc.: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8cmm-j6c4-rr8v Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://vikunja.io/changelog/vikunja-v2.2.2-was-released Types: Release Notes Added Reference Type CISA-ADP: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8cmm-j6c4-rr8v Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 24, 2026
Action Type Old Value New Value Added Reference https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8cmm-j6c4-rr8v -
New CVE Received by [email protected]
Mar. 24, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-863 Added Reference https://github.com/go-vikunja/vikunja/commit/833f2aec006ac0f6643c41872e45dd79220b9174 Added Reference https://github.com/go-vikunja/vikunja/pull/2449 Added Reference https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8cmm-j6c4-rr8v Added Reference https://vikunja.io/changelog/vikunja-v2.2.2-was-released