{"id":"CVE-2026-123526","title":"Vikunja before 2.7.1 Mass Assignment via Team external_id Field","summary":"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 e…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","cvssSource":"cna","cwe":["CWE-915"],"vendor":"go-vikunja","product":"vikunja","affected":["vikunja < 2.7.1"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:37:35.608Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123526","references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fjrf-gjmg-9v6g","label":"GitHub Security Advisory (GHSA-fjrf-gjmg-9v6g)"},{"url":"https://www.vulncheck.com/advisories/vikunja-before-2.7.1-mass-assignment-via-team-external-id-field","label":"VulnCheck Advisory: Vikunja before 2.7.1 Mass Assignment via Team external_id Field"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.687Z","slug":"CVE-2026-123526","body":"## Overview\n\nVikunja 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.\n\n## Affected\n\n- `vikunja < 2.7.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}