CVE-2026-44736CWE-200CWE-639CWE-836
OpenProject: Relations API Filter Bypasses Visibility Scope, Leaking Cross-Project Work Package Subjects
Medium · published June 26, 2026
What it is
OpenProject is open-source, web-based project management software. Prior to 17.4.0, the GET /api/v3/relations endpoint allows any authenticated user to retrieve relations — and the subject (title) of work packages they have no permission to view — by supplying an arbitrary work package ID in the involved, fromId, or toId filter. This bypasses the Relation.visible scope due to a flawed performance optimization in RelationQuery. This vulnerability is fixed in 17.4.0.
The record
Technical detail
- CVSS v3.1
- 6.5 · MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CVSS v4.0
- Not supplied
- EPSS
- 0.00393 · 32.6th percentile
- Weaknesses
- CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor; CWE-639 · Authorization Bypass Through User-Controlled Key; CWE-836 · Use of Password Hash Instead of Password for Authentication
- Published
- 2026-06-26T19:27Z
EPSS history
Timeline