{"id":"CVE-2026-76216","revision":"b7e3dd206bc44286a1912b833170ba0f","records":[{"revision":"b7e3dd206bc44286a1912b833170ba0f","observedAt":"2026-10-25T16:19:04.694+00:00","statement":{"source":"nvd","id":"CVE-2026-76216","aliases":[],"title":"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…","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":"2026-08-19T14:17:47.743+00:00","modifiedAt":"2026-09-16T20:18:30.54+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.7,"severity":"HIGH"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","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://nvd.nist.gov/vuln/detail/CVE-2026-76216","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-639"],"productCriteria":[],"sourceDates":{"published":"2026-08-19T14:17:47.743","lastModified":"2026-09-16T20:18:30.540"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-76216","identifiers":["CVE-2026-76216"]},"retained":false,"historicalAffected":[]}],"coverage":[]}