{"items":[{"id":"NVI-00011956","kind":"vulnerability","title":"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)","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-w39f-h553-h2mx","CVE-2026-91984"],"plain_summary":"GitHub lists this reviewed advisory for code.vikunja.io/api. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2e891fbda2850bf48301134f75866480"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-09-17T20:18:54.770Z","value":"4.3 MEDIUM (3.1)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-37e97f24e09ec7bca8b4ee531be96bf1"},{"kind":"CVSS","as_of":"2026-09-17T20:18:54.770Z","value":"5.3 MEDIUM (4.0)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-37e97f24e09ec7bca8b4ee531be96bf1"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.264%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.18371. Missing scores are unknown.","source_id":"sr-2e891fbda2850bf48301134f75866480"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-6f19eb22e16517d3233f3ce0630fca56","url":"https://github.com/advisories/GHSA-w39f-h553-h2mx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w39f-h553-h2mx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"},{"id":"sr-37e97f24e09ec7bca8b4ee531be96bf1","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91984","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-91984","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:59:50.242Z"},{"id":"sr-2e891fbda2850bf48301134f75866480","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-91984","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.089Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6f19eb22e16517d3233f3ce0630fca56"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"## Summary\n\nThe task-position endpoint authorizes only the task side of the write: `TaskPosition.CanUpdate` delegates to `Task.CanUpdate` (write access to the task's own project) and the request body's `project_view_id` is never validated to belong to the task's project, nor is any access to that view required. Any authenticated user with a single writable task of their own can persist `(task_id, project_view_id, position)` rows into any other tenant's project view (view IDs are small sequential integers and enumerable). Low position values (below `MinPositionSpacing`, 0.01) enter the recalculation branch, but `RecalculateTaskPositions` aborts on its own project read-access check before recalculating and the whole transaction rolls back, so no cross-tenant recalculation actually executes — only the plain row insert (position ≥ 0.01) persists. This is the same root-cause pattern as GHSA-569v-q83c-3j3g (kanban bucket relocation via project_view_id mass-assignment, fixed with a dual-side check for buckets in 2.4.0) surviving in the sibling position endpoint. Verified on Vikunja 2.5.0.\n\n## Details\n\nAffected endpoints (both verified):\n\n- v1: `POST /api/v1/tasks/{id}/position`\n- v2: `PUT","public_affected_ranges":["<= 2.5.0"]}],"null_published_at":"2026-11-04T10:04:35.931Z","source_updated_at":"2026-10-09T20:51:42.000Z","source_disclosed_at":"2026-10-09T20:51:41.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T23:14:22.124Z"},{"id":"NVI-00011956","kind":"vulnerability","title":"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)","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w39f-h553-h2mx","CVE-2026-91984"],"plain_summary":"GitHub lists this reviewed advisory for code.vikunja.io/api. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2e891fbda2850bf48301134f75866480"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.264%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.18371. Missing scores are unknown.","source_id":"sr-2e891fbda2850bf48301134f75866480"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-6f19eb22e16517d3233f3ce0630fca56","url":"https://github.com/advisories/GHSA-w39f-h553-h2mx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w39f-h553-h2mx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"},{"id":"sr-2e891fbda2850bf48301134f75866480","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-91984","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.089Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6f19eb22e16517d3233f3ce0630fca56"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"## Summary\n\nThe task-position endpoint authorizes only the task side of the write: `TaskPosition.CanUpdate` delegates to `Task.CanUpdate` (write access to the task's own project) and the request body's `project_view_id` is never validated to belong to the task's project, nor is any access to that view required. Any authenticated user with a single writable task of their own can persist `(task_id, project_view_id, position)` rows into any other tenant's project view (view IDs are small sequential integers and enumerable). Low position values (below `MinPositionSpacing`, 0.01) enter the recalculation branch, but `RecalculateTaskPositions` aborts on its own project read-access check before recalculating and the whole transaction rolls back, so no cross-tenant recalculation actually executes — only the plain row insert (position ≥ 0.01) persists. This is the same root-cause pattern as GHSA-569v-q83c-3j3g (kanban bucket relocation via project_view_id mass-assignment, fixed with a dual-side check for buckets in 2.4.0) surviving in the sibling position endpoint. Verified on Vikunja 2.5.0.\n\n## Details\n\nAffected endpoints (both verified):\n\n- v1: `POST /api/v1/tasks/{id}/position`\n- v2: `PUT","public_affected_ranges":["<= 2.5.0"]}],"null_published_at":"2026-11-01T14:34:14.107Z","source_updated_at":"2026-10-09T20:51:42.000Z","source_disclosed_at":"2026-10-09T20:51:41.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T23:14:22.124Z"},{"id":"NVI-00011956","kind":"vulnerability","title":"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)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w39f-h553-h2mx","CVE-2026-91984"],"plain_summary":"GitHub lists this reviewed advisory for code.vikunja.io/api. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-6f19eb22e16517d3233f3ce0630fca56"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-6f19eb22e16517d3233f3ce0630fca56","url":"https://github.com/advisories/GHSA-w39f-h553-h2mx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w39f-h553-h2mx","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6f19eb22e16517d3233f3ce0630fca56"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"## Summary\n\nThe task-position endpoint authorizes only the task side of the write: `TaskPosition.CanUpdate` delegates to `Task.CanUpdate` (write access to the task's own project) and the request body's `project_view_id` is never validated to belong to the task's project, nor is any access to that view required. Any authenticated user with a single writable task of their own can persist `(task_id, project_view_id, position)` rows into any other tenant's project view (view IDs are small sequential integers and enumerable). Low position values (below `MinPositionSpacing`, 0.01) enter the recalculation branch, but `RecalculateTaskPositions` aborts on its own project read-access check before recalculating and the whole transaction rolls back, so no cross-tenant recalculation actually executes — only the plain row insert (position ≥ 0.01) persists. This is the same root-cause pattern as GHSA-569v-q83c-3j3g (kanban bucket relocation via project_view_id mass-assignment, fixed with a dual-side check for buckets in 2.4.0) surviving in the sibling position endpoint. Verified on Vikunja 2.5.0.\n\n## Details\n\nAffected endpoints (both verified):\n\n- v1: `POST /api/v1/tasks/{id}/position`\n- v2: `PUT","public_affected_ranges":["<= 2.5.0"]}],"null_published_at":"2026-11-01T01:03:56.617Z","source_updated_at":"2026-10-09T20:51:42.000Z","source_disclosed_at":"2026-10-09T20:51:41.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T23:14:22.124Z"}],"next_cursor":null,"snapshot_revision":"42594"}