---
id: CVE-2026-68561
title: Wekan is open source kanban built with Meteor
summary: >-
  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 fieldName…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
  - CWE-863
published: '2026-08-19'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:15:59.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68561'
references:
  - url: >-
      https://github.com/wekan/wekan/commit/dc135f6e7d59f9f56065cd5df83b1f123ea120bb
    label: security-advisories@github.com
  - url: 'https://github.com/wekan/wekan/releases/tag/v9.89'
    label: security-advisories@github.com
  - url: 'https://github.com/wekan/wekan/security/advisories/GHSA-xm8x-c8wg-jhmf'
    label: security-advisories@github.com
  - url: 'https://github.com/wekan/wekan/security/advisories/GHSA-xm8x-c8wg-jhmf'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00506
epssPercentile: 0.40596
ingestedAt: '2026-09-09T21:22:45.543Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.