{"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","slug":"GHSA-p4r4-8cxw-pjx7","body":"## Overview\n\n### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-rj9j-8772-4h6c. This link is maintained to preserve external references.\n\n### Original Description\nVikunja 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.\n\n## Affected packages\n\n- `code.vikunja.io/api >= 0.24.0, <= 2.3.0`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"midnight","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}