{"id":"CVE-2026-76216","revision":"36428ac8359b43558f59a5e9f2dd80ed","records":[{"revision":"36428ac8359b43558f59a5e9f2dd80ed","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-76216","aliases":[],"title":"Vikunja through 2.4.0 Principal-Type Confusion via LinkSharing","description":"Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are treated as user principals with users.id == N at three permission checks lacking type guards. Attackers with a link-share JWT can remove victims from teams, enumerate and delete victim bot users, or read team rosters by exploiting id collisions in the autoincrement space.","state":0,"publishedAt":"2026-08-19T14:02:01.282+00:00","modifiedAt":"2026-08-20T16:10:29.192+00:00","affected":[{"ecosystem":"Vendor product","name":"vikunja","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"go-vikunja\",\n                    \"product\": \"vikunja\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/code.vikunja.io/api\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.4.0\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":7.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2","https://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linksharing"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-76216","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-76216","identifiers":["CVE-2026-76216"]},"retained":false,"historicalAffected":[]}],"coverage":[]}