{"id":"RHSA-2026:51436","summary":"Red Hat Security Advisory: postfix security update","modified":"2026-08-20T10:18:56Z","published":"2026-08-07T10:28:54Z","upstream":["CVE-2026-43964"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:51436"},{"type":"ARTICLE","url":"https://access.redhat.com/security/updates/classification/#important"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466488"},{"type":"ADVISORY","url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_51436.json"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43964"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2026-43964"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43964"},{"type":"ARTICLE","url":"https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html"}],"affected":[{"package":{"name":"postfix","ecosystem":"Red Hat:enterprise_linux_eus:10.0","purl":"pkg:rpm/redhat/postfix"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.8.5-8.el10_0.1"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2026:51436.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}