Vulnerability DatabaseCVE-2026-67528
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CVE-2026-67528
Published:July 30, 2026
Updated:August 04, 2026
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.
Affected Packages
https://github.com/opf/openproject.git (GITHUB):
Affected version(s) >=v17.0.0 <v17.6.0
Fix Suggestion:
Update to version v17.6.0
Related Resources (5)
https://github.com/opf/openproject/releases/tag/v17.6.0
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67528.json
https://github.com/opf/openproject/security/advisories/GHSA-wr3w-qchj-p4cm
https://nvd.nist.gov/vuln/detail/CVE-2026-67528
https://github.com/opf/openproject/commit/a13fa079bc8040449570384c19f2d98f637179f1
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
CWE-863
EPSS
Base Score:
0.21