{"id":"RLSA-2026:13830","summary":"Important: dovecot security update","details":"Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. \n\nSecurity Fix(es):\n\n* dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command (CVE-2025-59032)\n\n* dovecot: denial of service via crafted message before authentication (CVE-2026-27858)\n\n* dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-05-07T06:33:52.744392Z","published":"2026-05-07T06:00:59.922786Z","upstream":["CVE-2025-59032","CVE-2026-27857","CVE-2026-27858"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:13830"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452172"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452175"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452179"}],"affected":[{"package":{"name":"dovecot","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/dovecot?distro=rocky-linux-8&epoch=1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.3.16-7.el8_10"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:13830.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}