{"items":[{"id":"NVI-00011962","kind":"vulnerability","title":"Vikunja: Read-only project members can obtain any link share's access hash via the single-share read endpoint (v1 and v2) and escalate to the share's permission level","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-qfwc-vx6f-3g6g","CVE-2026-91985"],"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-7228278b4e6c72856d0722eef1afe7f4"],"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":"0.432%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.37515. Missing scores are unknown.","source_id":"sr-7228278b4e6c72856d0722eef1afe7f4"}],"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-708e41d2af4f9e90a43da337ee802929","url":"https://github.com/advisories/GHSA-qfwc-vx6f-3g6g","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-qfwc-vx6f-3g6g","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"},{"id":"sr-7228278b4e6c72856d0722eef1afe7f4","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-2026-91985","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.089Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-708e41d2af4f9e90a43da337ee802929"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"## Summary\n\nA user who has only read permission on a project can call the single link-share read endpoint and receive the share's `hash` field — the secret credential that the anonymous `POST /shares/{share}/auth` endpoint exchanges for a link-share JWT carrying the share's permission (read / read-write / admin). A read-only member can therefore mint a write- or admin-level token for the project and perform writes they are not entitled to, while their own user token is correctly refused. This is the remaining variant of the link-share hash disclosure class: GHSA-8hp8-9fhr-pfm9 fixed the list endpoint (ReadAll now requires project admin) but the single-read endpoint's gate was never aligned. Verified on Vikunja 2.5.0; the weak gate has existed since the endpoint, so earlier versions are likely affected too.\n\n## Details\n\nAffected endpoints (both verified with a complete chain):\n\n- v1: `GET /api/v1/projects/{project}/shares/{share}`\n- v2: `GET /api/v2/projects/{project}/shares/{share}`\n\nPermission gate: `LinkSharing.CanRead` (`pkg/models/link_sharing_permissions.go`) delegates to `project.CanRead(s, a)` — i.e. any user with read access to the project passes. The response serializes th","public_affected_ranges":["<= 2.5.0"]}],"null_published_at":"2026-11-03T10:03:21.790Z","source_updated_at":"2026-10-09T20:51:30.000Z","source_disclosed_at":"2026-10-09T20:51:29.000Z","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-00011962","kind":"vulnerability","title":"Vikunja: Read-only project members can obtain any link share's access hash via the single-share read endpoint (v1 and v2) and escalate to the share's permission level","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-qfwc-vx6f-3g6g","CVE-2026-91985"],"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-708e41d2af4f9e90a43da337ee802929"],"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-708e41d2af4f9e90a43da337ee802929","url":"https://github.com/advisories/GHSA-qfwc-vx6f-3g6g","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-qfwc-vx6f-3g6g","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-708e41d2af4f9e90a43da337ee802929"],"technology":"code.vikunja.io/api","known_exclusions":[],"conditions_summary":"## Summary\n\nA user who has only read permission on a project can call the single link-share read endpoint and receive the share's `hash` field — the secret credential that the anonymous `POST /shares/{share}/auth` endpoint exchanges for a link-share JWT carrying the share's permission (read / read-write / admin). A read-only member can therefore mint a write- or admin-level token for the project and perform writes they are not entitled to, while their own user token is correctly refused. This is the remaining variant of the link-share hash disclosure class: GHSA-8hp8-9fhr-pfm9 fixed the list endpoint (ReadAll now requires project admin) but the single-read endpoint's gate was never aligned. Verified on Vikunja 2.5.0; the weak gate has existed since the endpoint, so earlier versions are likely affected too.\n\n## Details\n\nAffected endpoints (both verified with a complete chain):\n\n- v1: `GET /api/v1/projects/{project}/shares/{share}`\n- v2: `GET /api/v2/projects/{project}/shares/{share}`\n\nPermission gate: `LinkSharing.CanRead` (`pkg/models/link_sharing_permissions.go`) delegates to `project.CanRead(s, a)` — i.e. any user with read access to the project passes. The response serializes th","public_affected_ranges":["<= 2.5.0"]}],"null_published_at":"2026-11-01T01:03:56.618Z","source_updated_at":"2026-10-09T20:51:30.000Z","source_disclosed_at":"2026-10-09T20:51:29.000Z","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"}