{"id":"EUVD-2026-62457","enisaUuid":"9a8abbe2-cab6-3f57-859a-7100a51fcc63","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 \u003d\u003d 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.","datePublished":"Aug 19, 2026, 2:02:01 PM","dateUpdated":"Aug 20, 2026, 4:10:29 PM","baseScore":7.7,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2\nhttps://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linksharing\n","aliases":"CVE-2026-76216\nGHSA-9xwc-vwww-qqmw\nGHSA-32r8-5843-4qw2\n","assigner":"VulnCheck","epss":0.36,"enisaIdProduct":[{"id":"2f01ce68-6aa4-3a40-b967-40e8c4827bcf","product":{"name":"vikunja","vendor":{"name":"go-vikunja"}},"product_version":"0 ≤2.4.0"}],"enisaIdVendor":[{"id":"cffc8371-82ba-38b6-98cf-f4aef841227c","vendor":{"name":"go-vikunja"}}],"enisaIdVulnerability":[{"id":"160fd98d-a4ce-38b7-b62f-7ca7dc8e0048","vulnerability":{"id":"GHSA-9xwc-vwww-qqmw","description":"Duplicate Advisory: Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure","datePublished":"Aug 19, 2026, 3:32:33 PM","dateUpdated":"Oct 9, 2026, 8:43:21 PM","baseScore":0.0,"references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-76216\nhttps://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linksharing\n","enisa_id":"EUVD-2026-62457\n","aliases":"GHSA-9xwc-vwww-qqmw\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 1:59:46 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"a26e8b20-af6c-3b72-a362-49825815b859","vulnerability":{"id":"CVE-2026-76216","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 \u003d\u003d 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.","datePublished":"Aug 19, 2026, 2:02:01 PM","dateUpdated":"Aug 20, 2026, 4:10:29 PM","status":"PUBLISHED","baseScore":7.7,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2\nhttps://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linksharing\n","enisa_id":"EUVD-2026-62457\n","assigner":"VulnCheck","epss":0.36,"dataProcessed":"Oct 28, 2026, 7:14:21 AM","vulnerabilityProduct":[{"id":"91e65302-754d-3320-a6ae-2ffc90c33b06","product":{"name":"vikunja","vendor":{"name":"go-vikunja"}},"product_version":"0 ≤2.4.0"}],"vulnerabilityVendor":[{"id":"e46b1045-74eb-3cb7-9c42-f9b3656bd52b","vendor":{"name":"go-vikunja"}}]}},{"id":"e1a53fba-3519-3234-9fe6-a90fbcce85cb","vulnerability":{"id":"GHSA-32r8-5843-4qw2","description":"Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure","datePublished":"Oct 9, 2026, 8:43:40 PM","dateUpdated":"Oct 27, 2026, 3:18:32 PM","baseScore":0.0,"references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-76216\nhttps://github.com/go-vikunja/vikunja/commit/a717d64d5658708ba390f18dd697f5e567e68aac\nhttps://github.com/go-vikunja/vikunja\nhttps://github.com/go-vikunja/vikunja/releases/tag/v2.5.0\nhttps://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linksharing\n","enisa_id":"EUVD-2026-62457\n","aliases":"GHSA-32r8-5843-4qw2\nCVE-2026-76216\n","epss":0.0,"dataProcessed":"Oct 28, 2026, 11:01:09 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}