{"id":"CVE-2026-44736","summary":"OpenProject: Relations API Filter Bypasses Visibility Scope, Leaking Cross-Project Work Package Subjects","details":"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.","aliases":["GHSA-p9gq-hrgh-2645"],"modified":"2026-07-15T01:48:56.962800290Z","published":"2026-06-26T19:27:54.656Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-200","CWE-639","CWE-836"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44736.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44736.json"},{"type":"ADVISORY","url":"https://github.com/opf/openproject/security/advisories/GHSA-p9gq-hrgh-2645"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44736"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/opf/openproject","events":[{"introduced":"0"},{"fixed":"57fb3abf08b0075149e7abe7dbf5de99e07aee06"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"17.4.0"}],"source":"AFFECTED_FIELD"}}],"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-2026-44736.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:H/I:N/A:N"}]}