---
id: CVE-2026-67528
title: 'OpenProject is open-source, web-based project management software'
summary: >-
  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
  checki…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-863
published: '2026-07-30'
updated: '2026-07-31'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67528'
references:
  - url: >-
      https://github.com/opf/openproject/commit/a13fa079bc8040449570384c19f2d98f637179f1
    label: security-advisories@github.com
  - url: 'https://github.com/opf/openproject/releases/tag/v17.6.0'
    label: security-advisories@github.com
  - url: 'https://github.com/opf/openproject/security/advisories/GHSA-wr3w-qchj-p4cm'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.0036
epssPercentile: 0.27122
ingestedAt: '2026-08-01T22:15:46.302Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.