{"id":"CVE-2026-86009","revision":"49b94cfe94dd4cc2b80bef72b47188d1","records":[{"revision":"49b94cfe94dd4cc2b80bef72b47188d1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-86009","aliases":[],"title":"Mailu: Domain managers can allow themselves to spoof on other hosted domains they should not control","description":"Mailu is a mail server distributed as a set of Docker images. Prior to f05aeb8322e2f61096af6b089d61ba6f40587d96, domain managers can enable spoofing for hosted domains they do not control. A potentially malicious domain administrator enables spoofing for another hosted domain and can send emails that are authenticated with DKIM/SPF for domains they should not be able to. This vulnerability is addressed by f05aeb8322e2f61096af6b089d61ba6f40587d96.","state":0,"publishedAt":"2026-10-16T16:19:06.42+00:00","modifiedAt":"2026-10-21T02:26:54.464+00:00","affected":[{"ecosystem":"Vendor product","name":"Mailu","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Mailu\",\n                    \"product\": \"Mailu\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< f05aeb8322e2f61096af6b089d61ba6f40587d96\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","score":8.2,"severity":"HIGH"}],"references":["https://github.com/Mailu/Mailu/security/advisories/GHSA-crww-m82r-2wfm","https://github.com/Mailu/Mailu/issues/2686","https://github.com/Mailu/Mailu/pull/4072","https://github.com/Mailu/Mailu/commit/f05aeb8322e2f61096af6b089d61ba6f40587d96"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-86009","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-86009","identifiers":["CVE-2026-86009"]},"retained":false,"historicalAffected":[]}],"coverage":[]}