Vulnerabilities CVE-2026-67528

CVE-2026-67528

Medium

Open

TLP:CLEAR

OpenProject: Improper Access Control through /api/v3/custom_options/:id via Path "id" leads to Sensitive Data Exposure

NVD CVE.org

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Description

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.

Details

CVSS Score: 4.3
EPSS Score ⓘ: 0.21%

11.4th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Confidence: 90%
Published: Jul 30, 2026
Last Modified: Jul 31, 2026

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