{"id":"CVE-2026-40896","summary":"OpenProject has Cross-Project Meeting Agenda Item Injection via Unscoped Section Lookup","details":"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.","aliases":["GHSA-hh5p-gwf8-h245"],"modified":"2026-07-08T07:34:21.579606363Z","published":"2026-04-20T15:12:52.279Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-367","CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40896.json","unresolved_ranges":[{"extracted_events":[{"fixed":"17.3.0"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40896.json"},{"type":"ADVISORY","url":"https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40896"},{"type":"FIX","url":"https://github.com/opf/openproject/commit/8f693a1f35d0a84bb69af78fb6925f74329ae4fe"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/opf/openproject","events":[{"introduced":"0"},{"fixed":"8f693a1f35d0a84bb69af78fb6925f74329ae4fe"}],"database_specific":{"source":"REFERENCES"}}],"versions":["11.2.1","v10.5","v9.0.0-pre","v5.0.4","sprint/2015_04","sprint/2015_03","sprint/2015_02","sprint/2015_01","sprint/2014_18","sprint/2014_16","sprint/2014_13","sprint/2014_12","sprint/2014_11","sprint/2014_10","sprint/2014_09","sprint/2014_08","2.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40896.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"}]}