CVE-2026-59154 Wekan: Checklist direct DDP updates can write checklist data into private boards
Authenticated users can bypass board authorization to write checklist data into private boards they do not have access to.
- 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-2026-59154?
CVE-2026-59154 is a medium-severity missing authorization vulnerability in wekan, published on 10 Jul 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. Prior to 9.64, Wekan has a cross-board authorization bypass in the direct Meteor collection allow rules for Checklists and ChecklistItems because updates are authorized only against the current source doc.cardId and do not inspect the destination cardId or boardId in the update modifier, allowing a low-privileged authenticated user with write access to one board and knowledge of a target private card id to create checklist data on an accessible card and move it into a private board where they are not a member. This issue is fixed in version 9.64.
Weakness: CWE-863
Which versions are affected by CVE-2026-59154?
How do I fix CVE-2026-59154?
No fix has been published for CVE-2026-59154 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-2026-59154 being exploited?
There is no known exploitation of CVE-2026-59154 in the wild and no public exploit code.
Sources
Also known as GHSA-gv8h-5p3p-6hx7.