OpenProject: Shares API Information Disclosure

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.

Scores

EPSS (exploitation in 30 days)

0.37% · top 69% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• CWE-863: Incorrect Authorization (opens in a new tab)All about CWE-863 and its CVEs

Affected products

• opf · openproject

  • affected < 17.3.2

References (1)

• https://github.com/opf/openproject/security/advisories/GHSA-cfg3-f34w-9xx5 (opens in a new tab)x_refsource_CONFIRM

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-44735](https://trackcve.app/badge/CVE-2026-44735.svg)](https://trackcve.app/cve/CVE-2026-44735)

Record last updated 29 Jun 2026, 15:20 UTC.