# CVE-2026-44735: OpenProject incorrect authorization in Shares API

Source: https://junglewise.ai/threats/cve-2026-44735-openproject-incorrect-authorization-in-shares-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-26. Updated: 2026-06-26  
License: CC BY 4.0 with a link back

CVE-2026-44735 · Severity: medium · CVSS 6.5 · Published 2026-06-26

OpenProject, a web-based project management tool, contains a security flaw that allows project members to view information they are not authorized to see. An authenticated user can access the titles and sharing details of all work packages within a project, even those marked as confidential or private. This could lead to the exposure of sensitive project data, including confidential task names and the identities of users with special access roles.

## Quick answers

**Is CVE-2026-44735 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-44735 being exploited in the wild.

**How severe is CVE-2026-44735?** Medium severity, with a CVSS score of 6.5, published 26 June 2026.

**Which products and versions are affected?** opf OpenProject < 17.3.2, < 17.4.0.

**Is there a fix for CVE-2026-44735?** A patch was published: Fixed in versions 17.3.2 and 17.4.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-44735 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-44735?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An incorrect authorization vulnerability (CWE-863) exists in OpenProject's Shares API. The 'GET /api/v3/shares' endpoint fails to perform granular visibility checks on individual work packages, instead relying solely on project-level permissions. Specifically, the 'visible_for_non_admins' scope in 'app/models/members/scopes/visible.rb' does not filter results by 'WorkPackage.visible(user)'. An authenticated attacker with 'view_shared_work_packages' permissions can enumerate all work package shares in a project, leaking confidential titles, IDs, and user role assignments. The issue is resolved in versions 17.3.2 and 17.4.0 by adding proper entity-level visibility filtering to the database query.

## Affected products

- opf OpenProject < 17.3.2, < 17.4.0

## Timeline

- 2026-05-13: advisory: Vendor advisory published on GitHub
- 2026-06-26: disclosed: CVE published to NVD
- patched: Fixed in versions 17.3.2 and 17.4.0

## References

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