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CVE-2026-67529— OpenProject: Private work package subject/identity disclosure through the global Time Entries and Cost Entries APIs (linked work package rendered without visibility check)

Quick assessment

Affected
opf openproject
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenProject是OpenProject组织开源的一个基于Web的项目管理软件。 OpenProject 17.6.0之前版本存在安全漏洞，该漏洞源于在渲染/api/v3/time_entries和/api/v3/cost_entries时未检查WorkPackage.visible或view_work_packages权限，可能导致拥有view_time_entries或view_cost_entries权限的用户读取私有工作包主题和ID。

CVSS 4.3 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
opf openproject < 17.6.0 affected
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I. Basic Information for CVE-2026-67529

Vulnerability Information
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Vulnerability Title
OpenProject: Private work package subject/identity disclosure through the global Time Entries and Cost Entries APIs (linked work package rendered without visibility check)
Source: CVE Program / CVE List V5
Vulnerability Description
OpenProject is open-source, web-based project management software. Prior to 17.6.0, GET /api/v3/time_entries and GET /api/v3/cost_entries rendered _links.workPackage.title and _links.workPackage.href through associated_resource in modules/costs/lib/api/v3/time_entries/time_entry_representer.rb and modules/costs/lib/api/v3/cost_entries/cost_entry_representer.rb without checking WorkPackage.visible or view_work_packages, allowing users with view_time_entries or view_cost_entries to read private work package subjects and ids. This issue is fixed in 17.6.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
OpenProject 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenProject是OpenProject组织开源的一个基于Web的项目管理软件。 OpenProject 17.6.0之前版本存在安全漏洞，该漏洞源于在渲染/api/v3/time_entries和/api/v3/cost_entries时未检查WorkPackage.visible或view_work_packages权限，可能导致拥有view_time_entries或view_cost_entries权限的用户读取私有工作包主题和ID。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
opf openproject < 17.6.0 -

II. Public POCs for CVE-2026-67529

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III. Intelligence Information for CVE-2026-67529

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Patches & Fixes for CVE-2026-67529 (3)

Vendor Advisories for CVE-2026-67529 (1)

Same Patch Batch · opf · 2026-07-30 · 3 CVEs total

CVE-2026-67527 7.6 HIGH OpenProject: Improper Access Control through /api/v3/work_packages/<X.id> via PATCH parame
CVE-2026-67528 4.3 MEDIUM OpenProject: Improper Access Control through /api/v3/custom_options/:id via Path "id" lead

IV. Related Vulnerabilities

Same product: openproject
Same vendor: opf
Same weakness: CWE-200

V. Comments for CVE-2026-67529

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