CVE-2026-67528
MEDIUMOpenProject: Improper Access Control through /api/v3/custom_options/:id via Path "id" leads to Sensitive Data Exposure
Title source: cnaDescription
OpenProject is open-source, web-based project management software. Prior to 17.6.0, GET /api/v3/custom_options/:id resolved CustomOption records by global numeric id and allowed UserCustomField and GroupCustomField options without checking visible(current_user), so authenticated non-admin users could enumerate sequential custom option ids and read labels belonging to admin_only user or group custom fields. This issue is fixed in 17.6.0.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/opf/openproject/security/advisories/GHSA-wr3w-qchj-p4cm
X_Refsource_Misc x_refsource_misc
https://github.com/opf/openproject/commit/a13fa079bc8040449570384c19f2d98f637179f1
X_Refsource_Misc x_refsource_misc
https://github.com/opf/openproject/releases/tag/v17.6.0
Scores
CVSS v3
4.3
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Details
CWE
CWE-863
Status
published
Products (1)
opf/openproject
< 17.6.0
Published
Jul 30, 2026
Tracked Since
Jul 31, 2026