---
id: "CVE-2026-68582"
kind: "vulnerability"
aliases: ["CVE-2026-68582", "GHSA-rj9j-8772-4h6c", "GO-2026-6749"]
title: "Vikunja: Link-share token reads any tenant's kanban buckets and enumerates usernames/IDs instance-wide (BOLA) in code.vikunja.io/api"
severity: "critical"
cvss: 9.3
epss: 0.00267
exploited: false
status: "open"
category: "runtime"
products: [{"name": "code.vikunja.io/api", "fixed": [], "affected": ">= 0.24.0", "ecosystem": "go"}]
ecosystems: ["go"]
tags: ["go", "runtime", "self-hosted", "vikunja"]
not_affected_if: ["version-2.4.0-or-later", "version-below-0.24.0"]
published_at: "2026-08-02T13:16:54+00:00"
first_seen_at: "2026-10-23T19:13:08+00:00"
updated_at: "2026-10-23T21:43:49+00:00"
sources: [{"source": "govuln", "url": "https://pkg.go.dev/vuln/GO-2026-6749", "first_seen_at": "2026-10-23T19:13:08+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-68582", "first_seen_at": "2026-10-23T19:13:43+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68582", "first_seen_at": "2026-10-23T19:35:23+00:00"}]
---

# Vikunja: Link-share token reads any tenant's kanban buckets and enumerates usernames/IDs instance-wide (BOLA) in code.vikunja.io/api

Vikunja's task-collection endpoint loads a project view from the URL without checking the caller's access. Anyone holding a link-share token for one project can read bucket titles and creator usernames, names and IDs from any project on the instance, and can tell which project and view IDs exist.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- go:code.vikunja.io/api affected >= 0.24.0 fixed ?

## How to check

Check the running Vikunja version; it is affected if it is >= 0.24.0 and <= 2.3.0.

## Fix

Upgrade Vikunja to 2.4.0 or later.

## Timeline

- 2026-10-23T19:13:08+00:00 govuln https://pkg.go.dev/vuln/GO-2026-6749
- 2026-10-23T19:13:43+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-68582
- 2026-10-23T19:35:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-68582

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_