Vulnerability · Published Jul 10, 2026 · Assigned by GitHub_M

CVE-2026-59154Wekan: Checklist direct DDP updates can write checklist data into private boards

Medium 4.3

In plain English

A medium-severity incorrect authorization in wekan from wekan. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 70.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
wekan	wekan	< 9.64

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

https://github.com/wekan/wekan/security/advisories/GHSA-gv8h-5p3p-6hx7 x_refsource_CONFIRM
https://github.com/wekan/wekan/commit/b1ca76007b9a295fd029dfefc1a2d1d6f1920835 x_refsource_MISC
https://github.com/wekan/wekan/releases/tag/v9.64 x_refsource_MISC