CVE-2026-67528: 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…

PriorityP422medium4.3CVSS 3.1

AVNACLPRLUINSUCLINAN

EPSS

0.21%

11.5th percentile

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

1 ranges

Vendor	Product	Version range	Fixed in
opf	openproject	< 17.6.0	17.6.0

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