CVE-2026-44735

MEDIUM 6.5

OpenProject: Shares API Information Disclosure

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, the GET /api/v3/shares endpoint returns share details for ALL work packages in a project to any user with the view_shared_work_packages permission. The authorization check operates at the project level only — it does not verify the requesting user can actually view each individual shared work package. This allows a regular project member to discover work package IDs and subjects (including confidential titles), which users have been granted shared access, what role level was assigned (Editor, Commenter, Viewer). This vulnerability is fixed in 17.3.2 and 17.4.0.

CWE	CWE-863
Vendor	opf
Product	openproject
Published	Jun 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

opf / openproject

< 17.3.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/opf/openproject/security/advisories/GHSA-cfg3-f34w-9xx5