RLSA-2026:13857

RLSA-2026:13857 · Important: dovecot security update

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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. Security Fix(es): * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command (CVE-2025-59032) * dovecot: denial of service via crafted message before authentication (CVE-2026-27858) * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857) For 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.

CVSS 7.5 · High · Fix available

Published

2026-05-07T12:03:39.445016Z

Updated

2026-05-07T12:30:09.667621Z

Stack: system

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