CVE-2026-44735 OpenProject: Shares API Information Disclosure
A regular project member can view confidential work package details and share permissions due to insufficient authorization checks in the Shares API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44735?
CVE-2026-44735 is a medium-severity missing authorization vulnerability in opf openproject, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-863
Which versions are affected by CVE-2026-44735?
How do I fix CVE-2026-44735?
No fix has been published for CVE-2026-44735 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-44735 being exploited?
There is no known exploitation of CVE-2026-44735 in the wild and no public exploit code.
Sources
Also known as GHSA-cfg3-f34w-9xx5.