{"apiVersion":"1.0","identifier":"CVE-2026-68561","description":"Wekan is open source kanban built with Meteor. Prior to 9.89, the second Boards.allow({ update }) rule in server/permissions/boards.js called canUpdateBoardSort in server/lib/utils.js, which authorized any board member whenever fieldNames included sort. Because Meteor combines allow rules with OR semantics and applies the complete modifier, a comment-only or read-only member could send one Boards.update with $set values for sort, members, permission, and title, make themselves the sole board administrator, expose a private board, and evict the legitimate owner; the last-admin deny rule inspected only $pull and did not block a wholesale $set of members. Version 9.89 requires sort to be the only modified field and rejects $set member arrays that remove the last active administrator. This issue is fixed in version 9.89.","publishedAt":"2026-08-19T20:17:21","lastModifiedAt":"2026-08-25T14:16:53","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-68561","cvssScore":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00375,"riskScore":0.91,"affectedProduct":"Wekan","affectedVersions":"<9.89","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-68561","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-68561","en":"https://www.redsauce.net/en/cves/CVE-2026-68561","fr":"https://www.redsauce.net/fr/cves/CVE-2026-68561","pt":"https://www.redsauce.net/pt/cves/CVE-2026-68561","de":"https://www.redsauce.net/de/cves/CVE-2026-68561","sk":"https://www.redsauce.net/sk/cves/CVE-2026-68561","el":"https://www.redsauce.net/el/cves/CVE-2026-68561"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-68561"}}