{"schema":"threatline.record/2","record":{"id":"CVE-2026-111918","aliases":["GHSA-fprf-r6rv-xg99","GO-2026-6731"],"summary":"Vikunja 1.0.0-rc0 before 2.7.0 Cross-Tenant Task Position Writes via Saved Filter Creation","details":"Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write task_positions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing default_project_id, then create empty-filter saved filters to persist cross-tenant references and amplify writes for denial of service.","categories":["Libraries & packages"],"product":"vikunja","vendor":"go-vikunja","ecosystem":"Go","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111918","source_modified_at":"2026-10-19T16:39:37.953Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"vikunja","vendor":"go-vikunja","versions":[{"version":"1.0.0-rc0","status":"affected","versionType":"semver","lessThan":"2.7.0"},{"version":"2.7.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-fprf-r6rv-xg99","source_modified_at":"2026-10-19T21:40:46.828122007Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"code.vikunja.io/api","ecosystem":"Go","purl":"pkg:golang/code.vikunja.io/api"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0-rc0"},{"last_affected":"2.6.0"}]}],"versions":[]}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111918","source_modified_at":"2026-10-19T16:39:37.953Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"vikunja","ecosystem":null},"version":"2.7.0","basis":"first unaffected version stated in the CVE record"}],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.06815,"score_date":"2026-10-23"},"published_at":"2026-10-17T18:46:33.245Z","modified_at":"2026-10-19T21:40:46.828122007Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-111918","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T16:39:37.953Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-fprf-r6rv-xg99","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T21:40:46.828122007Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111918","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/vikunja-1.0.0-rc0-before-2.7.0-cross-tenant-task-position-writes-via-saved-filter-creation","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-19T15:35:34.423236Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T21:40:46.828122007Z","content_hash":"1a2b331f6e0ce4a8b30007eb177913ef1cc05051d2f01cbd2ca42c04c24a93e7"}}