CVE-2026-67528: CWE-863: Incorrect Authorization in opf openproject
OpenProject versions prior to 17.6.0 contain an authorization vulnerability where authenticated non-admin users can enumerate sequential custom option IDs and access labels of admin-only user or group custom fields. This issue is resolved in version 17.6.0.
AI Analysis
Technical Summary
CVE-2026-67528 is an incorrect authorization vulnerability (CWE-863) in OpenProject, an open-source project management software. Before version 17.6.0, the API endpoint GET /api/v3/custom_options/:id allowed authenticated non-admin users to retrieve CustomOption records by global numeric ID without verifying visibility permissions (visible(current_user)). This flaw enabled enumeration of sequential custom option IDs and unauthorized reading of labels belonging to admin-only user or group custom fields. The vulnerability is fixed in OpenProject 17.6.0.
Potential Impact
The vulnerability allows authenticated non-admin users to bypass authorization checks and access labels of custom options intended only for admin users or groups. This results in limited confidentiality impact (disclosure of restricted labels) but does not affect integrity or availability.
Mitigation Recommendations
Upgrade OpenProject to version 17.6.0 or later, where this authorization issue is fixed. Patch status is confirmed by the vendor stating the fix is included in 17.6.0. No additional mitigation is indicated.
CVE-2026-67528: CWE-863: Incorrect Authorization in opf openproject
Description
OpenProject versions prior to 17.6.0 contain an authorization vulnerability where authenticated non-admin users can enumerate sequential custom option IDs and access labels of admin-only user or group custom fields. This issue is resolved in version 17.6.0.
CVSS v3.1
Score 4.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-67528 is an incorrect authorization vulnerability (CWE-863) in OpenProject, an open-source project management software. Before version 17.6.0, the API endpoint GET /api/v3/custom_options/:id allowed authenticated non-admin users to retrieve CustomOption records by global numeric ID without verifying visibility permissions (visible(current_user)). This flaw enabled enumeration of sequential custom option IDs and unauthorized reading of labels belonging to admin-only user or group custom fields. The vulnerability is fixed in OpenProject 17.6.0.
Potential Impact
The vulnerability allows authenticated non-admin users to bypass authorization checks and access labels of custom options intended only for admin users or groups. This results in limited confidentiality impact (disclosure of restricted labels) but does not affect integrity or availability.
Mitigation Recommendations
Upgrade OpenProject to version 17.6.0 or later, where this authorization issue is fixed. Patch status is confirmed by the vendor stating the fix is included in 17.6.0. No additional mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-29T18:47:17.073Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6ba8439c2644c7f892a6e1
Added to database: 07/30/2026, 19:38:43 UTC
Last enriched: 07/30/2026, 19:53:55 UTC
Last updated: 07/30/2026, 20:29:50 UTC
Views: 5
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