{"id":"CVE-2026-91984","revision":"d7a7fd8d266444b4931a40d332586d0e","records":[{"revision":"d7a7fd8d266444b4931a40d332586d0e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-91984","aliases":[],"title":"Vikunja before 2.6.0 Broken Object-Level Authorization via task-position","description":"Vikunja before 2.6.0 fails to validate that user-supplied project_view_id in task-position requests belongs to the task's project. Authenticated attackers can insert task position rows into arbitrary other tenant project views via POST or PUT task-position endpoints.","state":0,"publishedAt":"2026-09-15T15:18:27.606+00:00","modifiedAt":"2026-09-17T19:27:58.744+00:00","affected":[{"ecosystem":"Vendor product","name":"vikunja","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"go-vikunja\",\n                    \"product\": \"vikunja\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.6.0\"\n                        },\n                        {\n                            \"version\": \"2.6.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-w39f-h553-h2mx","https://www.vulncheck.com/advisories/vikunja-before-2.6.0-broken-object-level-authorization-via-task-position"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-91984","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-91984","identifiers":["CVE-2026-91984"]},"retained":false,"historicalAffected":[]}],"coverage":[]}