OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target project, meeting, or victim is required; the attacker can blindly spray items into every meeting on the instance by iterating sequential section IDs. Version 17.3.0 patches the issue.
History

Mon, 20 Apr 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 20 Apr 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Opf
Opf openproject
Vendors & Products Opf
Opf openproject

Mon, 20 Apr 2026 15:45:00 +0000

Type Values Removed Values Added
Description OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target project, meeting, or victim is required; the attacker can blindly spray items into every meeting on the instance by iterating sequential section IDs. Version 17.3.0 patches the issue.
Title OpenProject has Cross-Project Meeting Agenda Item Injection via Unscoped Section Lookup
Weaknesses CWE-367
CWE-639
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-20T15:12:52.279Z

Updated: 2026-04-20T16:13:10.714Z

Reserved: 2026-04-15T16:37:22.766Z

Link: CVE-2026-40896

cve-icon Vulnrichment

Updated: 2026-04-20T16:12:58.827Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-20T16:16:48.567

Modified: 2026-04-20T19:03:07.607

Link: CVE-2026-40896

cve-icon Redhat

No data.