{"action":"Upgrade code.vikunja.io/api to 2.6.0 or later.","affected":[{"fixed":"2.6.0","introduced":"0"}],"component":"code.vikunja.io/api","cve_ids":["CVE-2026-91984"],"ecosystem":"Go","exploited":false,"fixed_versions":["2.6.0"],"ghsa_id":"GHSA-w39f-h553-h2mx","id":"tcs_01M5JJNQDW0Q87M2C0WQV3HTA9","modified_at":"2026-10-19T21:40:58.721073742Z","published_at":"2026-10-09T20:51:41Z","references":["https://osv.dev/vulnerability/GHSA-w39f-h553-h2mx","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-w39f-h553-h2mx","https://nvd.nist.gov/vuln/detail/CVE-2026-91984","https://github.com/go-vikunja/vikunja/pull/3688","https://github.com/go-vikunja/vikunja/commit/077dc4de79ce6f1ab59215a2c7bf9b30423685f2","https://github.com/go-vikunja/vikunja","https://github.com/go-vikunja/vikunja/releases/tag/v2.6.0","https://www.vulncheck.com/advisories/vikunja-before-2.6.0-broken-object-level-authorization-via-task-position"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-w39f-h553-h2mx","url":"https://osv.dev/vulnerability/GHSA-w39f-h553-h2mx"},{"source":"nvd","source_id":"CVE-2026-91984","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91984"}],"summary":"Vikunja: Cross-tenant task-position rows can be injected into arbitrary project views via the unvalidated project_view_id in the task position endpoint (v1 and v2)"}