Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-68559Wekan: Broken access control in the Excel-export route (`/api/boards/:boardId/exportExcel`)

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in wekan from wekan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 65.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
wekan	wekan	>= 9.57, < 9.74

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/wekan/wekan/security/advisories/GHSA-mwq8-ccpm-r533 x_refsource_CONFIRM
https://github.com/wekan/wekan/commit/7bbd1a3fad5d868fd01d79b5908913e215698e8e x_refsource_MISC
https://github.com/wekan/wekan/releases/tag/v9.74 x_refsource_MISC