{"id":"CVE-2026-66412","summary":"Leantime all versions prior to and 3.6.2 Broken Access Control via tickets.getMilestone JSON-RPC","details":"Leantime 3.6.2 and prior contains a broken access control vulnerability that allows authenticated users to read milestone data from projects they are not assigned to by supplying arbitrary integer milestone IDs to the tickets.getMilestone JSON-RPC endpoint. Attackers can enumerate integer milestone IDs through the JSON-RPC API to access project planning information, milestone titles, descriptions, and timelines across all projects on the instance regardless of project membership.","aliases":["GHSA-wv69-xr82-phr6"],"modified":"2026-08-12T03:51:10.410677891Z","published":"2026-07-27T05:23:20.773Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66412.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66412.json"},{"type":"ADVISORY","url":"https://github.com/Leantime/leantime/security/advisories/GHSA-wv69-xr82-phr6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66412"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/leantime-all-versions-prior-to-and-broken-access-control-via-tickets-getmilestone-json-rpc"},{"type":"REPORT","url":"https://github.com/Leantime/leantime/pull/3657"},{"type":"FIX","url":"https://github.com/Leantime/leantime/commit/68898eeb914882a21797523f2782914795bc67ae"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/leantime/leantime","events":[{"introduced":"0"},{"fixed":"68898eeb914882a21797523f2782914795bc67ae"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"3.6.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66412.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}