CVE-2026-59154: Wekan: Checklist direct DDP updates can write checklist data into private boards
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Wekanto a version that resolves this vulnerability.Fixed in 9.64
Event History
Frequently Asked Questions
What is the severity of CVE-2026-59154?
The severity of CVE-2026-59154 is medium with a score of 4.3.
How do I fix CVE-2026-59154?
To fix CVE-2026-59154, upgrade Wekan to version 9.64 or later.
What impact does CVE-2026-59154 have?
CVE-2026-59154 allows unauthorized writing of checklist data into private boards due to cross-board authorization bypass.
Is CVE-2026-59154 a remote or local vulnerability?
CVE-2026-59154 is classified as a network-accessible vulnerability, thus posing a risk for remote exploitation.
What components are affected by CVE-2026-59154?
CVE-2026-59154 affects the checklist and checklist item functionalities in Wekan.