CVE-2026-68559 Wekan: Broken access control in the Excel-export route (`/api/boards/:boardId/exportExcel`)
An attacker can download private board data from Wekan because an asynchronous authorization check was not awaited, allowing unauthorized access to sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-68559?
CVE-2026-68559 is a medium-severity missing authorization vulnerability in wekan, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Wekan is open source kanban built with Meteor. From 9.57 until 9.74, the /api/boards/:boardId/exportExcel route in models/exportExcel.js called the asynchronous exporterExcel.canExport(user) authorization guard from models/server/ExporterExcel.js without awaiting it. The returned Promise was always truthy, so exporterExcel.build(res) ran even when board.isVisibleBy(user) would deny access, allowing any authenticated non-member to download private board card titles, descriptions, lists, swimlanes, members, and metadata. This issue is fixed in version 9.74.
Weakness: CWE-639
Which versions are affected by CVE-2026-68559?
How do I fix CVE-2026-68559?
No fix has been published for CVE-2026-68559 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-68559 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-68559 exists.
Sources
Also known as GHSA-mwq8-ccpm-r533.