---
id: GHSA-p4r4-8cxw-pjx7
title: >-
  Duplicate Advisory: Vikunja: Link-share token reads any tenant's kanban
  buckets and enumerates usernames/IDs instance-wide (BOLA)
summary: >-
  Duplicate Advisory: Vikunja: Link-share token reads any tenant's kanban
  buckets and enumerates usernames/IDs instance-wide (BOLA)
severity: critical
cvss: 6.5
cwe:
  - CWE-639
vendor: api
product: code.vikunja.io/api
ecosystem: go
affected:
  - 'code.vikunja.io/api >= 0.24.0, <= 2.3.0'
published: '2026-08-02'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T20:42:26Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-p4r4-8cxw-pjx7'
references:
  - url: >-
      https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rj9j-8772-4h6c
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68582'
  - url: >-
      https://www.vulncheck.com/advisories/vikunja-broken-object-level-authorization-via-link-share-token
  - url: 'https://github.com/advisories/GHSA-p4r4-8cxw-pjx7'
tags:
  - ghsa
  - go
ingestedAt: '2026-10-09T21:12:42.334Z'
---

## Overview

### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-rj9j-8772-4h6c. This link is maintained to preserve external references.

### Original Description
Vikunja versions >= 0.24.0 and <= 2.3.0 contain a broken object level authorization (BOLA) vulnerability in the task-collection endpoint (GET /api/v1/projects/{project}/views/{view}/tasks). The endpoint loads the requested project view from the URL path without verifying the caller is authorized for it. For a link-share token holder, the task scope is pinned to the share's own project, but the view is taken from the attacker-controlled path and never re-validated. As a result, a holder of any project share link can read any other tenant's kanban bucket records — bucket titles and the full created_by user object (username, name, id) — for every view in the instance. The same missing pre-authorization view load also creates a project/view-ID existence oracle (404 vs. non-404) usable by link shares and ordinary authenticated users. Task contents remain constrained to the share's own project and are not disclosed. Fixed in 2.4.0.

## Affected packages

- `code.vikunja.io/api >= 0.24.0, <= 2.3.0`

## Remediation

Refer to the advisory for the patched release.