{"id":"CVE-2026-123526","published":"2026-11-08T02:16:42.303","lastModified":"2026-11-09T14:17:10.203","description":"Vikunja before 2.7.1 contains a mass assignment vulnerability that allows any authenticated user to set the read-only external_id field through the team create and update endpoints. Attackers can tag a team they create or administer as externally managed, permanently blocking removal of every member and causing SSO members to be dropped from the team at their next login.","cvssScore":5.4,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","cwes":["CWE-915"],"vendors":[],"products":[],"references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fjrf-gjmg-9v6g","tags":[]},{"url":"https://www.vulncheck.com/advisories/vikunja-before-2.7.1-mass-assignment-via-team-external-id-field","tags":[]},{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fjrf-gjmg-9v6g","tags":[]}],"exploitRefs":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fjrf-gjmg-9v6g","tags":[]},{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fjrf-gjmg-9v6g","tags":[]}],"hasPoc":true,"ai":null}